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5b93d8bb AM |
1 | /* tc-i370.c -- Assembler for the IBM 360/370/390 instruction set. |
2 | Loosely based on the ppc files by Linas Vepstas <linas@linas.org> 1998, 99 | |
1049f94e | 3 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
f7e42eb4 | 4 | Free Software Foundation, Inc. |
5b93d8bb AM |
5 | Written by Ian Lance Taylor, Cygnus Support. |
6 | ||
7 | This file is part of GAS, the GNU Assembler. | |
8 | ||
9 | GAS is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GAS is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GAS; see the file COPYING. If not, write to the Free | |
21 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
92774660 | 22 | 02111-1307, USA. */ |
5b93d8bb AM |
23 | |
24 | /* This assembler implements a very hacked version of an elf-like thing | |
25 | * that gcc emits (when gcc is suitably hacked). To make it behave more | |
26 | * HLASM-like, try turning on the -M or --mri flag (as there are various | |
27 | * similarities between HLASM and the MRI assemblers, such as section | |
28 | * names, lack of leading . in pseudo-ops, DC and DS, etc ... | |
29 | */ | |
30 | ||
31 | #include <stdio.h> | |
5b93d8bb | 32 | #include "as.h" |
44addf7f | 33 | #include "safe-ctype.h" |
5b93d8bb AM |
34 | #include "subsegs.h" |
35 | #include "struc-symbol.h" | |
36 | ||
37 | #include "opcode/i370.h" | |
38 | ||
39 | #ifdef OBJ_ELF | |
40 | #include "elf/i370.h" | |
41 | #endif | |
42 | ||
43 | /* This is the assembler for the System/390 Architecture */ | |
44 | ||
45 | /* Tell the main code what the endianness is. */ | |
46 | extern int target_big_endian; | |
47 | ||
48 | \f | |
49 | /* Generic assembler global variables which must be defined by all | |
50 | targets. */ | |
51 | ||
52 | #ifdef OBJ_ELF | |
53 | /* This string holds the chars that always start a comment. If the | |
54 | pre-processor is disabled, these aren't very useful. The macro | |
55 | tc_comment_chars points to this. We use this, rather than the | |
56 | usual comment_chars, so that we can switch for Solaris conventions. */ | |
57 | static const char i370_eabi_comment_chars[] = "#"; | |
58 | ||
59 | const char *i370_comment_chars = i370_eabi_comment_chars; | |
60 | #else | |
61 | const char comment_chars[] = "#"; | |
62 | #endif | |
63 | ||
64 | /* Characters which start a comment at the beginning of a line. */ | |
65 | const char line_comment_chars[] = "#*"; | |
66 | ||
67 | /* Characters which may be used to separate multiple commands on a | |
68 | single line. */ | |
69 | const char line_separator_chars[] = ";"; | |
70 | ||
71 | /* Characters which are used to indicate an exponent in a floating | |
72 | point number. */ | |
73 | const char EXP_CHARS[] = "eE"; | |
74 | ||
75 | /* Characters which mean that a number is a floating point constant, | |
76 | as in 0d1.0. */ | |
77 | const char FLT_CHARS[] = "dD"; | |
78 | ||
5b93d8bb AM |
79 | void |
80 | md_show_usage (stream) | |
81 | FILE *stream; | |
82 | { | |
bc805888 | 83 | fprintf (stream, "\ |
5b93d8bb AM |
84 | S/370 options: (these have not yet been tested and may not work) \n\ |
85 | -u ignored\n\ | |
86 | -mregnames Allow symbolic names for registers\n\ | |
87 | -mno-regnames Do not allow symbolic names for registers\n"); | |
88 | #ifdef OBJ_ELF | |
bc805888 | 89 | fprintf (stream, "\ |
5b93d8bb AM |
90 | -mrelocatable support for GCC's -mrelocatble option\n\ |
91 | -mrelocatable-lib support for GCC's -mrelocatble-lib option\n\ | |
92 | -V print assembler version number\n"); | |
93 | #endif | |
94 | } | |
95 | ||
96 | \f | |
97 | static void i370_byte PARAMS ((int)); | |
98 | static void i370_tc PARAMS ((int)); | |
99 | static void i370_ebcdic PARAMS ((int)); | |
100 | ||
101 | static void i370_dc PARAMS ((int)); | |
102 | static void i370_ds PARAMS ((int)); | |
103 | static void i370_rmode PARAMS ((int)); | |
104 | static void i370_csect PARAMS ((int)); | |
105 | static void i370_dsect PARAMS ((int)); | |
106 | static void i370_ltorg PARAMS ((int)); | |
107 | static void i370_using PARAMS ((int)); | |
108 | static void i370_drop PARAMS ((int)); | |
109 | static void i370_make_relative PARAMS ((expressionS *exp, expressionS *baseaddr)); | |
110 | ||
111 | #ifdef OBJ_ELF | |
112 | static bfd_reloc_code_real_type i370_elf_suffix PARAMS ((char **, expressionS *)); | |
113 | static void i370_elf_cons PARAMS ((int)); | |
114 | static void i370_elf_rdata PARAMS ((int)); | |
115 | static void i370_elf_lcomm PARAMS ((int)); | |
116 | static void i370_elf_validate_fix PARAMS ((fixS *, segT)); | |
117 | #endif | |
118 | ||
5b93d8bb AM |
119 | \f |
120 | /* The target specific pseudo-ops which we support. */ | |
121 | ||
122 | const pseudo_typeS md_pseudo_table[] = | |
123 | { | |
124 | /* Pseudo-ops which must be overridden. */ | |
125 | { "byte", i370_byte, 0 }, | |
126 | ||
127 | { "dc", i370_dc, 0 }, | |
128 | { "ds", i370_ds, 0 }, | |
129 | { "rmode", i370_rmode, 0 }, | |
130 | { "csect", i370_csect, 0 }, | |
131 | { "dsect", i370_dsect, 0 }, | |
132 | ||
133 | /* enable ebcdic strings e.g. for 3270 support */ | |
134 | { "ebcdic", i370_ebcdic, 0 }, | |
135 | ||
136 | #ifdef OBJ_ELF | |
137 | { "long", i370_elf_cons, 4 }, | |
138 | { "word", i370_elf_cons, 4 }, | |
139 | { "short", i370_elf_cons, 2 }, | |
140 | { "rdata", i370_elf_rdata, 0 }, | |
141 | { "rodata", i370_elf_rdata, 0 }, | |
142 | { "lcomm", i370_elf_lcomm, 0 }, | |
143 | #endif | |
144 | ||
145 | /* This pseudo-op is used even when not generating XCOFF output. */ | |
146 | { "tc", i370_tc, 0 }, | |
147 | ||
148 | /* dump the literal pool */ | |
149 | { "ltorg", i370_ltorg, 0 }, | |
150 | ||
151 | /* support the hlasm-style USING directive */ | |
152 | { "using", i370_using, 0 }, | |
153 | { "drop", i370_drop, 0 }, | |
154 | ||
155 | { NULL, NULL, 0 } | |
156 | }; | |
157 | ||
158 | /* ***************************************************************** */ | |
159 | ||
160 | /* Whether to use user friendly register names. */ | |
b34976b6 | 161 | #define TARGET_REG_NAMES_P TRUE |
5b93d8bb | 162 | |
b34976b6 | 163 | static bfd_boolean reg_names_p = TARGET_REG_NAMES_P; |
5b93d8bb | 164 | |
b34976b6 | 165 | static bfd_boolean register_name PARAMS ((expressionS *)); |
5b93d8bb AM |
166 | static void i370_set_cpu PARAMS ((void)); |
167 | static i370_insn_t i370_insert_operand | |
168 | PARAMS ((i370_insn_t insn, const struct i370_operand *operand, offsetT val)); | |
169 | static void i370_macro PARAMS ((char *str, const struct i370_macro *macro)); | |
170 | \f | |
171 | /* Predefined register names if -mregnames */ | |
172 | /* In general, there are lots of them, in an attempt to be compatible */ | |
173 | /* with a number of assemblers. */ | |
174 | ||
175 | /* Structure to hold information about predefined registers. */ | |
176 | struct pd_reg | |
177 | { | |
178 | char *name; | |
179 | int value; | |
180 | }; | |
181 | ||
182 | /* List of registers that are pre-defined: | |
183 | ||
184 | Each general register has predefined names of the form: | |
185 | 1. r<reg_num> which has the value <reg_num>. | |
186 | 2. r.<reg_num> which has the value <reg_num>. | |
187 | ||
5b93d8bb AM |
188 | Each floating point register has predefined names of the form: |
189 | 1. f<reg_num> which has the value <reg_num>. | |
190 | 2. f.<reg_num> which has the value <reg_num>. | |
191 | ||
192 | There are only four floating point registers, and these are | |
193 | commonly labelled 0,2,4 and 6. Thus, there is no f1, f3, etc. | |
194 | ||
5b93d8bb AM |
195 | There are individual registers as well: |
196 | rbase or r.base has the value 3 (base register) | |
197 | rpgt or r.pgt has the value 4 (page origin table pointer) | |
198 | rarg or r.arg has the value 11 (argument pointer) | |
199 | rtca or r.tca has the value 12 (table of contents pointer) | |
200 | rtoc or r.toc has the value 12 (table of contents pointer) | |
201 | sp or r.sp has the value 13 (stack pointer) | |
202 | dsa or r.dsa has the value 13 (stack pointer) | |
203 | lr has the value 14 (link reg) | |
204 | ||
92774660 | 205 | The table is sorted. Suitable for searching by a binary search. */ |
5b93d8bb AM |
206 | |
207 | static const struct pd_reg pre_defined_registers[] = | |
208 | { | |
209 | { "arg", 11 }, /* Argument Pointer */ | |
210 | { "base", 3 }, /* Base Reg */ | |
211 | ||
212 | { "f.0", 0 }, /* Floating point registers */ | |
213 | { "f.2", 2 }, | |
214 | { "f.4", 4 }, | |
215 | { "f.6", 6 }, | |
216 | ||
217 | { "f0", 0 }, | |
218 | { "f2", 2 }, | |
219 | { "f4", 4 }, | |
220 | { "f6", 6 }, | |
221 | ||
5b93d8bb AM |
222 | { "dsa",13 }, /* stack pointer */ |
223 | { "lr", 14 }, /* Link Register */ | |
224 | { "pgt", 4 }, /* Page Origin Table Pointer */ | |
225 | ||
226 | { "r.0", 0 }, /* General Purpose Registers */ | |
227 | { "r.1", 1 }, | |
228 | { "r.10", 10 }, | |
229 | { "r.11", 11 }, | |
230 | { "r.12", 12 }, | |
231 | { "r.13", 13 }, | |
232 | { "r.14", 14 }, | |
233 | { "r.15", 15 }, | |
234 | { "r.2", 2 }, | |
235 | { "r.3", 3 }, | |
236 | { "r.4", 4 }, | |
237 | { "r.5", 5 }, | |
238 | { "r.6", 6 }, | |
239 | { "r.7", 7 }, | |
240 | { "r.8", 8 }, | |
241 | { "r.9", 9 }, | |
242 | ||
243 | { "r.arg", 11 }, /* Argument Pointer */ | |
244 | { "r.base", 3 }, /* Base Reg */ | |
245 | { "r.dsa", 13 }, /* Stack Pointer */ | |
246 | { "r.pgt", 4 }, /* Page Origin Table Pointer */ | |
247 | { "r.sp", 13 }, /* Stack Pointer */ | |
248 | ||
249 | { "r.tca", 12 }, /* Pointer to the table of contents */ | |
250 | { "r.toc", 12 }, /* Pointer to the table of contents */ | |
251 | ||
252 | { "r0", 0 }, /* More general purpose registers */ | |
253 | { "r1", 1 }, | |
254 | { "r10", 10 }, | |
255 | { "r11", 11 }, | |
256 | { "r12", 12 }, | |
257 | { "r13", 13 }, | |
258 | { "r14", 14 }, | |
259 | { "r15", 15 }, | |
260 | { "r2", 2 }, | |
261 | { "r3", 3 }, | |
262 | { "r4", 4 }, | |
263 | { "r5", 5 }, | |
264 | { "r6", 6 }, | |
265 | { "r7", 7 }, | |
266 | { "r8", 8 }, | |
267 | { "r9", 9 }, | |
268 | ||
269 | { "rbase", 3 }, /* Base Reg */ | |
270 | ||
271 | { "rtca", 12 }, /* Pointer to the table of contents */ | |
272 | { "rtoc", 12 }, /* Pointer to the table of contents */ | |
273 | ||
274 | { "sp", 13 }, /* Stack Pointer */ | |
275 | ||
276 | }; | |
277 | ||
bc805888 | 278 | #define REG_NAME_CNT (sizeof (pre_defined_registers) / sizeof (struct pd_reg)) |
5b93d8bb AM |
279 | |
280 | /* Given NAME, find the register number associated with that name, return | |
281 | the integer value associated with the given name or -1 on failure. */ | |
282 | ||
283 | static int reg_name_search | |
284 | PARAMS ((const struct pd_reg *, int, const char * name)); | |
285 | ||
286 | static int | |
287 | reg_name_search (regs, regcount, name) | |
288 | const struct pd_reg *regs; | |
289 | int regcount; | |
290 | const char *name; | |
291 | { | |
292 | int middle, low, high; | |
293 | int cmp; | |
294 | ||
295 | low = 0; | |
296 | high = regcount - 1; | |
297 | ||
298 | do | |
299 | { | |
300 | middle = (low + high) / 2; | |
301 | cmp = strcasecmp (name, regs[middle].name); | |
302 | if (cmp < 0) | |
303 | high = middle - 1; | |
304 | else if (cmp > 0) | |
305 | low = middle + 1; | |
306 | else | |
307 | return regs[middle].value; | |
308 | } | |
309 | while (low <= high); | |
310 | ||
311 | return -1; | |
312 | } | |
313 | ||
314 | /* | |
315 | * Summary of register_name(). | |
316 | * | |
317 | * in: Input_line_pointer points to 1st char of operand. | |
318 | * | |
b6ff326e | 319 | * out: An expressionS. |
5b93d8bb AM |
320 | * The operand may have been a register: in this case, X_op == O_register, |
321 | * X_add_number is set to the register number, and truth is returned. | |
322 | * Input_line_pointer->(next non-blank) char after operand, or is in its | |
323 | * original state. | |
324 | */ | |
325 | ||
b34976b6 | 326 | static bfd_boolean |
5b93d8bb AM |
327 | register_name (expressionP) |
328 | expressionS *expressionP; | |
329 | { | |
330 | int reg_number; | |
331 | char *name; | |
332 | char *start; | |
333 | char c; | |
334 | ||
468cced8 | 335 | /* Find the spelling of the operand. */ |
5b93d8bb | 336 | start = name = input_line_pointer; |
3882b010 | 337 | if (name[0] == '%' && ISALPHA (name[1])) |
5b93d8bb AM |
338 | name = ++input_line_pointer; |
339 | ||
340 | else if (!reg_names_p) | |
b34976b6 | 341 | return FALSE; |
5b93d8bb AM |
342 | |
343 | while (' ' == *name) | |
344 | name = ++input_line_pointer; | |
345 | ||
468cced8 AM |
346 | /* If it's a number, treat it as a number. If it's alpha, look to |
347 | see if it's in the register table. */ | |
3882b010 | 348 | if (!ISALPHA (name[0])) |
5b93d8bb | 349 | { |
07726851 | 350 | reg_number = get_single_number (); |
5b93d8bb AM |
351 | } |
352 | else | |
353 | { | |
354 | c = get_symbol_end (); | |
355 | reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); | |
468cced8 AM |
356 | |
357 | /* Put back the delimiting char. */ | |
358 | *input_line_pointer = c; | |
5b93d8bb AM |
359 | } |
360 | ||
468cced8 | 361 | /* If numeric, make sure its not out of bounds. */ |
5b93d8bb AM |
362 | if ((0 <= reg_number) && (16 >= reg_number)) |
363 | { | |
364 | expressionP->X_op = O_register; | |
365 | expressionP->X_add_number = reg_number; | |
366 | ||
468cced8 | 367 | /* Make the rest nice. */ |
5b93d8bb AM |
368 | expressionP->X_add_symbol = NULL; |
369 | expressionP->X_op_symbol = NULL; | |
b34976b6 | 370 | return TRUE; |
5b93d8bb AM |
371 | } |
372 | ||
468cced8 AM |
373 | /* Reset the line as if we had not done anything. */ |
374 | input_line_pointer = start; | |
b34976b6 | 375 | return FALSE; |
5b93d8bb AM |
376 | } |
377 | \f | |
378 | /* Local variables. */ | |
379 | ||
380 | /* The type of processor we are assembling for. This is one or more | |
381 | of the I370_OPCODE flags defined in opcode/i370.h. */ | |
382 | static int i370_cpu = 0; | |
383 | ||
384 | /* The base register to use for opcode with optional operands. | |
385 | * We define two of these: "text" and "other". Normally, "text" | |
386 | * would get used in the .text section for branches, while "other" | |
387 | * gets used in the .data section for address constants. | |
388 | * | |
389 | * The idea of a second base register in a different section | |
390 | * is foreign to the usual HLASM-style semantics; however, it | |
391 | * allows us to provide support for dynamically loaded libraries, | |
392 | * by allowing us to place address constants in a section other | |
393 | * than the text section. The "other" section need not be the | |
394 | * .data section, it can be any section that isn't the .text section. | |
395 | * | |
396 | * Note that HLASM defines a multiple, concurrent .using semantic | |
397 | * that we do not: in calculating offsets, it uses either the most | |
398 | * recent .using directive, or the one with the smallest displacement. | |
399 | * This allows HLASM to support a quasi-block-scope-like behaviour. | |
400 | * Handy for people writing assembly by hand ... but not supported | |
401 | * by us. | |
402 | */ | |
403 | static int i370_using_text_regno = -1; | |
404 | static int i370_using_other_regno = -1; | |
405 | ||
406 | /* The base address for address literals */ | |
407 | static expressionS i370_using_text_baseaddr; | |
408 | static expressionS i370_using_other_baseaddr; | |
409 | ||
410 | /* the "other" section, used only for syntax error detection */ | |
411 | static segT i370_other_section = undefined_section; | |
412 | ||
413 | /* Opcode hash table. */ | |
414 | static struct hash_control *i370_hash; | |
415 | ||
416 | /* Macro hash table. */ | |
417 | static struct hash_control *i370_macro_hash; | |
418 | ||
419 | #ifdef OBJ_ELF | |
420 | /* What type of shared library support to use */ | |
421 | static enum { SHLIB_NONE, SHLIB_PIC, SHILB_MRELOCATABLE } shlib = SHLIB_NONE; | |
422 | #endif | |
423 | ||
424 | /* Flags to set in the elf header */ | |
425 | static flagword i370_flags = 0; | |
426 | ||
427 | #ifndef WORKING_DOT_WORD | |
2b4f075a HPN |
428 | int md_short_jump_size = 4; |
429 | int md_long_jump_size = 4; | |
5b93d8bb AM |
430 | #endif |
431 | \f | |
432 | #ifdef OBJ_ELF | |
5a38dc70 | 433 | const char *md_shortopts = "l:um:K:VQ:"; |
5b93d8bb | 434 | #else |
5a38dc70 | 435 | const char *md_shortopts = "um:"; |
5b93d8bb AM |
436 | #endif |
437 | struct option md_longopts[] = | |
438 | { | |
439 | {NULL, no_argument, NULL, 0} | |
440 | }; | |
bc805888 | 441 | size_t md_longopts_size = sizeof (md_longopts); |
5b93d8bb AM |
442 | |
443 | int | |
444 | md_parse_option (c, arg) | |
445 | int c; | |
446 | char *arg; | |
447 | { | |
448 | switch (c) | |
449 | { | |
450 | case 'u': | |
451 | /* -u means that any undefined symbols should be treated as | |
452 | external, which is the default for gas anyhow. */ | |
453 | break; | |
454 | ||
455 | #ifdef OBJ_ELF | |
456 | case 'K': | |
457 | /* Recognize -K PIC */ | |
458 | if (strcmp (arg, "PIC") == 0 || strcmp (arg, "pic") == 0) | |
459 | { | |
460 | shlib = SHLIB_PIC; | |
461 | i370_flags |= EF_I370_RELOCATABLE_LIB; | |
462 | } | |
463 | else | |
464 | return 0; | |
465 | ||
466 | break; | |
467 | #endif | |
468 | ||
469 | case 'm': | |
470 | ||
471 | /* -m360 mean to assemble for the ancient 360 architecture */ | |
472 | if (strcmp (arg, "360") == 0 || strcmp (arg, "i360") == 0) | |
473 | i370_cpu = I370_OPCODE_360; | |
474 | /* -mxa means to assemble for the IBM 370 XA */ | |
475 | else if (strcmp (arg, "xa") == 0) | |
476 | i370_cpu = I370_OPCODE_370_XA; | |
477 | /* -many means to assemble for any architecture (370/XA). */ | |
478 | else if (strcmp (arg, "any") == 0) | |
479 | i370_cpu = I370_OPCODE_370; | |
480 | ||
481 | else if (strcmp (arg, "regnames") == 0) | |
b34976b6 | 482 | reg_names_p = TRUE; |
5b93d8bb AM |
483 | |
484 | else if (strcmp (arg, "no-regnames") == 0) | |
b34976b6 | 485 | reg_names_p = FALSE; |
5b93d8bb AM |
486 | |
487 | #ifdef OBJ_ELF | |
488 | /* -mrelocatable/-mrelocatable-lib -- warn about initializations that require relocation */ | |
489 | else if (strcmp (arg, "relocatable") == 0) | |
490 | { | |
491 | shlib = SHILB_MRELOCATABLE; | |
492 | i370_flags |= EF_I370_RELOCATABLE; | |
493 | } | |
494 | ||
495 | else if (strcmp (arg, "relocatable-lib") == 0) | |
496 | { | |
497 | shlib = SHILB_MRELOCATABLE; | |
498 | i370_flags |= EF_I370_RELOCATABLE_LIB; | |
499 | } | |
500 | ||
501 | #endif | |
502 | else | |
503 | { | |
504 | as_bad ("invalid switch -m%s", arg); | |
505 | return 0; | |
506 | } | |
507 | break; | |
508 | ||
509 | #ifdef OBJ_ELF | |
510 | /* -V: SVR4 argument to print version ID. */ | |
511 | case 'V': | |
512 | print_version_id (); | |
513 | break; | |
514 | ||
515 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
516 | should be emitted or not. FIXME: Not implemented. */ | |
517 | case 'Q': | |
518 | break; | |
519 | ||
520 | #endif | |
521 | ||
522 | default: | |
523 | return 0; | |
524 | } | |
525 | ||
526 | return 1; | |
527 | } | |
528 | ||
529 | \f | |
530 | /* Set i370_cpu if it is not already set. | |
531 | Currently defaults to the reasonable superset; | |
92774660 | 532 | but can be made more fine grained if desred. */ |
5b93d8bb AM |
533 | |
534 | static void | |
535 | i370_set_cpu () | |
536 | { | |
537 | const char *default_os = TARGET_OS; | |
538 | const char *default_cpu = TARGET_CPU; | |
539 | ||
92774660 | 540 | /* override with the superset for the moment. */ |
5b93d8bb AM |
541 | i370_cpu = I370_OPCODE_ESA390_SUPERSET; |
542 | if (i370_cpu == 0) | |
543 | { | |
544 | if (strcmp (default_cpu, "i360") == 0) | |
545 | i370_cpu = I370_OPCODE_360; | |
546 | else if (strcmp (default_cpu, "i370") == 0) | |
547 | i370_cpu = I370_OPCODE_370; | |
548 | else if (strcmp (default_cpu, "XA") == 0) | |
549 | i370_cpu = I370_OPCODE_370_XA; | |
550 | else | |
551 | as_fatal ("Unknown default cpu = %s, os = %s", default_cpu, default_os); | |
552 | } | |
553 | } | |
554 | ||
555 | /* Figure out the BFD architecture to use. */ | |
56d27c17 | 556 | /* hack alert -- specify the different 370 architectures */ |
5b93d8bb AM |
557 | |
558 | enum bfd_architecture | |
559 | i370_arch () | |
560 | { | |
561 | return bfd_arch_i370; | |
562 | } | |
563 | ||
564 | /* This function is called when the assembler starts up. It is called | |
565 | after the options have been parsed and the output file has been | |
566 | opened. */ | |
567 | ||
568 | void | |
569 | md_begin () | |
570 | { | |
571 | register const struct i370_opcode *op; | |
572 | const struct i370_opcode *op_end; | |
573 | const struct i370_macro *macro; | |
574 | const struct i370_macro *macro_end; | |
b34976b6 | 575 | bfd_boolean dup_insn = FALSE; |
5b93d8bb AM |
576 | |
577 | i370_set_cpu (); | |
578 | ||
579 | #ifdef OBJ_ELF | |
92774660 | 580 | /* Set the ELF flags if desired. */ |
5b93d8bb AM |
581 | if (i370_flags) |
582 | bfd_set_private_flags (stdoutput, i370_flags); | |
583 | #endif | |
584 | ||
585 | /* Insert the opcodes into a hash table. */ | |
586 | i370_hash = hash_new (); | |
587 | ||
588 | op_end = i370_opcodes + i370_num_opcodes; | |
589 | for (op = i370_opcodes; op < op_end; op++) | |
590 | { | |
591 | know ((op->opcode & op->mask) == op->opcode); | |
592 | ||
593 | if ((op->flags & i370_cpu) != 0) | |
594 | { | |
595 | const char *retval; | |
596 | ||
597 | retval = hash_insert (i370_hash, op->name, (PTR) op); | |
598 | if (retval != (const char *) NULL) | |
599 | { | |
600 | as_bad ("Internal assembler error for instruction %s", op->name); | |
b34976b6 | 601 | dup_insn = TRUE; |
5b93d8bb AM |
602 | } |
603 | } | |
604 | } | |
605 | ||
606 | /* Insert the macros into a hash table. */ | |
607 | i370_macro_hash = hash_new (); | |
608 | ||
609 | macro_end = i370_macros + i370_num_macros; | |
610 | for (macro = i370_macros; macro < macro_end; macro++) | |
611 | { | |
612 | if ((macro->flags & i370_cpu) != 0) | |
613 | { | |
614 | const char *retval; | |
615 | ||
616 | retval = hash_insert (i370_macro_hash, macro->name, (PTR) macro); | |
617 | if (retval != (const char *) NULL) | |
618 | { | |
619 | as_bad ("Internal assembler error for macro %s", macro->name); | |
b34976b6 | 620 | dup_insn = TRUE; |
5b93d8bb AM |
621 | } |
622 | } | |
623 | } | |
624 | ||
625 | if (dup_insn) | |
626 | abort (); | |
627 | } | |
628 | ||
629 | /* Insert an operand value into an instruction. */ | |
630 | ||
631 | static i370_insn_t | |
632 | i370_insert_operand (insn, operand, val) | |
633 | i370_insn_t insn; | |
634 | const struct i370_operand *operand; | |
635 | offsetT val; | |
636 | { | |
637 | if (operand->insert) | |
638 | { | |
639 | const char *errmsg; | |
640 | ||
641 | /* used for 48-bit insn's */ | |
642 | errmsg = NULL; | |
643 | insn = (*operand->insert) (insn, (long) val, &errmsg); | |
644 | if (errmsg) | |
645 | as_bad ("%s", errmsg); | |
646 | } | |
647 | else | |
648 | { | |
649 | /* this is used only for 16, 32 bit insn's */ | |
650 | insn.i[0] |= (((long) val & ((1 << operand->bits) - 1)) | |
651 | << operand->shift); | |
652 | } | |
653 | ||
654 | return insn; | |
655 | } | |
656 | ||
657 | \f | |
658 | #ifdef OBJ_ELF | |
659 | /* Parse @got, etc. and return the desired relocation. | |
56d27c17 AM |
660 | Currently, i370 does not support (don't really need to support) any |
661 | of these fancier markups ... for example, no one is going to | |
662 | write 'L 6,=V(bogus)@got' it just doesn't make sense (at least to me). | |
663 | So basically, we could get away with this routine returning | |
664 | BFD_RELOC_UNUSED in all circumstances. However, I'll leave | |
665 | in for now in case someone ambitious finds a good use for this stuff ... | |
666 | this routine was pretty much just copied from the powerpc code ... */ | |
5b93d8bb AM |
667 | static bfd_reloc_code_real_type |
668 | i370_elf_suffix (str_p, exp_p) | |
669 | char **str_p; | |
670 | expressionS *exp_p; | |
671 | { | |
672 | struct map_bfd | |
673 | { | |
674 | char *string; | |
675 | int length; | |
676 | bfd_reloc_code_real_type reloc; | |
677 | }; | |
678 | ||
679 | char ident[20]; | |
680 | char *str = *str_p; | |
681 | char *str2; | |
682 | int ch; | |
683 | int len; | |
684 | struct map_bfd *ptr; | |
685 | ||
bc805888 | 686 | #define MAP(str,reloc) { str, sizeof (str)-1, reloc } |
5b93d8bb AM |
687 | |
688 | static struct map_bfd mapping[] = | |
689 | { | |
56d27c17 AM |
690 | /* warnings with -mrelocatable. */ |
691 | MAP ("fixup", BFD_RELOC_CTOR), | |
692 | { (char *)0, 0, BFD_RELOC_UNUSED } | |
5b93d8bb AM |
693 | }; |
694 | ||
695 | if (*str++ != '@') | |
696 | return BFD_RELOC_UNUSED; | |
697 | ||
698 | for (ch = *str, str2 = ident; | |
699 | (str2 < ident + sizeof (ident) - 1 | |
3882b010 | 700 | && (ISALNUM (ch) || ch == '@')); |
5b93d8bb AM |
701 | ch = *++str) |
702 | { | |
3882b010 | 703 | *str2++ = TOLOWER (ch); |
5b93d8bb AM |
704 | } |
705 | ||
706 | *str2 = '\0'; | |
707 | len = str2 - ident; | |
708 | ||
709 | ch = ident[0]; | |
710 | for (ptr = &mapping[0]; ptr->length > 0; ptr++) | |
711 | if (ch == ptr->string[0] | |
712 | && len == ptr->length | |
713 | && memcmp (ident, ptr->string, ptr->length) == 0) | |
714 | { | |
715 | if (exp_p->X_add_number != 0 | |
716 | && (ptr->reloc == BFD_RELOC_16_GOTOFF | |
717 | || ptr->reloc == BFD_RELOC_LO16_GOTOFF | |
718 | || ptr->reloc == BFD_RELOC_HI16_GOTOFF | |
719 | || ptr->reloc == BFD_RELOC_HI16_S_GOTOFF)) | |
720 | as_warn ("identifier+constant@got means identifier@got+constant"); | |
721 | ||
722 | /* Now check for identifier@suffix+constant */ | |
723 | if (*str == '-' || *str == '+') | |
724 | { | |
725 | char *orig_line = input_line_pointer; | |
726 | expressionS new_exp; | |
727 | ||
728 | input_line_pointer = str; | |
729 | expression (&new_exp); | |
730 | if (new_exp.X_op == O_constant) | |
731 | { | |
732 | exp_p->X_add_number += new_exp.X_add_number; | |
733 | str = input_line_pointer; | |
734 | } | |
735 | ||
736 | if (&input_line_pointer != str_p) | |
737 | input_line_pointer = orig_line; | |
738 | } | |
739 | ||
740 | *str_p = str; | |
741 | return ptr->reloc; | |
742 | } | |
743 | ||
744 | return BFD_RELOC_UNUSED; | |
745 | } | |
746 | ||
92774660 KH |
747 | /* Like normal .long/.short/.word, except support @got, etc. */ |
748 | /* clobbers input_line_pointer, checks end-of-line. */ | |
5b93d8bb AM |
749 | static void |
750 | i370_elf_cons (nbytes) | |
751 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
752 | { | |
753 | expressionS exp; | |
754 | bfd_reloc_code_real_type reloc; | |
755 | ||
756 | if (is_it_end_of_statement ()) | |
757 | { | |
758 | demand_empty_rest_of_line (); | |
759 | return; | |
760 | } | |
761 | ||
762 | do | |
763 | { | |
764 | expression (&exp); | |
765 | if (exp.X_op == O_symbol | |
766 | && *input_line_pointer == '@' | |
767 | && (reloc = i370_elf_suffix (&input_line_pointer, &exp)) != BFD_RELOC_UNUSED) | |
768 | { | |
769 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); | |
770 | int size = bfd_get_reloc_size (reloc_howto); | |
771 | ||
772 | if (size > nbytes) | |
773 | as_bad ("%s relocations do not fit in %d bytes\n", reloc_howto->name, nbytes); | |
774 | ||
775 | else | |
776 | { | |
777 | register char *p = frag_more ((int) nbytes); | |
778 | int offset = nbytes - size; | |
779 | ||
780 | fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size, &exp, 0, reloc); | |
781 | } | |
782 | } | |
783 | else | |
784 | emit_expr (&exp, (unsigned int) nbytes); | |
785 | } | |
786 | while (*input_line_pointer++ == ','); | |
787 | ||
92774660 | 788 | input_line_pointer--; /* Put terminator back into stream. */ |
5b93d8bb AM |
789 | demand_empty_rest_of_line (); |
790 | } | |
791 | ||
792 | \f | |
793 | /* ASCII to EBCDIC conversion table. */ | |
794 | static unsigned char ascebc[256] = | |
795 | { | |
796 | /*00 NL SH SX EX ET NQ AK BL */ | |
797 | 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F, | |
798 | /*08 BS HT LF VT FF CR SO SI */ | |
799 | 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, | |
800 | /*10 DL D1 D2 D3 D4 NK SN EB */ | |
801 | 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26, | |
802 | /*18 CN EM SB EC FS GS RS US */ | |
803 | 0x18, 0x19, 0x3F, 0x27, 0x1C, 0x1D, 0x1E, 0x1F, | |
804 | /*20 SP ! " # $ % & ' */ | |
805 | 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, | |
806 | /*28 ( ) * + , - . / */ | |
807 | 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61, | |
808 | /*30 0 1 2 3 4 5 6 7 */ | |
809 | 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, | |
810 | /*38 8 9 : ; < = > ? */ | |
811 | 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F, | |
812 | /*40 @ A B C D E F G */ | |
813 | 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, | |
814 | /*48 H I J K L M N O */ | |
815 | 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, | |
816 | /*50 P Q R S T U V W */ | |
817 | 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, | |
818 | /*58 X Y Z [ \ ] ^ _ */ | |
819 | 0xE7, 0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D, | |
820 | /*60 ` a b c d e f g */ | |
821 | 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
822 | /*68 h i j k l m n o */ | |
823 | 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, | |
824 | /*70 p q r s t u v w */ | |
825 | 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, | |
826 | /*78 x y z { | } ~ DL */ | |
827 | 0xA7, 0xA8, 0xA9, 0xC0, 0x4F, 0xD0, 0xA1, 0x07, | |
828 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
829 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
830 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
831 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
832 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
833 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
834 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
835 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
836 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
837 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
838 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
839 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
840 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
841 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
842 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, | |
843 | 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0xFF | |
844 | }; | |
845 | ||
846 | /* EBCDIC to ASCII conversion table. */ | |
847 | unsigned char ebcasc[256] = | |
848 | { | |
849 | /*00 NU SH SX EX PF HT LC DL */ | |
850 | 0x00, 0x01, 0x02, 0x03, 0x00, 0x09, 0x00, 0x7F, | |
851 | /*08 SM VT FF CR SO SI */ | |
852 | 0x00, 0x00, 0x00, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, | |
853 | /*10 DE D1 D2 TM RS NL BS IL */ | |
854 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x0A, 0x08, 0x00, | |
855 | /*18 CN EM CC C1 FS GS RS US */ | |
856 | 0x18, 0x19, 0x00, 0x00, 0x1C, 0x1D, 0x1E, 0x1F, | |
857 | /*20 DS SS FS BP LF EB EC */ | |
858 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x0A, 0x17, 0x1B, | |
859 | /*28 SM C2 EQ AK BL */ | |
860 | 0x00, 0x00, 0x00, 0x00, 0x05, 0x06, 0x07, 0x00, | |
861 | /*30 SY PN RS UC ET */ | |
862 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, | |
863 | /*38 C3 D4 NK SU */ | |
864 | 0x00, 0x00, 0x00, 0x00, 0x14, 0x15, 0x00, 0x1A, | |
865 | /*40 SP */ | |
866 | 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
867 | /*48 . < ( + | */ | |
868 | 0x00, 0x00, 0x00, 0x2E, 0x3C, 0x28, 0x2B, 0x7C, | |
869 | /*50 & */ | |
870 | 0x26, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
871 | /*58 ! $ * ) ; ^ */ | |
872 | 0x00, 0x00, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E, | |
873 | /*60 - / */ | |
874 | 0x2D, 0x2F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
875 | /*68 , % _ > ? */ | |
876 | 0x00, 0x00, 0x00, 0x2C, 0x25, 0x5F, 0x3E, 0x3F, | |
877 | /*70 */ | |
878 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
879 | /*78 ` : # @ ' = " */ | |
880 | 0x00, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22, | |
881 | /*80 a b c d e f g */ | |
882 | 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, | |
883 | /*88 h i { */ | |
884 | 0x68, 0x69, 0x00, 0x7B, 0x00, 0x00, 0x00, 0x00, | |
885 | /*90 j k l m n o p */ | |
886 | 0x00, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, | |
887 | /*98 q r } */ | |
888 | 0x71, 0x72, 0x00, 0x7D, 0x00, 0x00, 0x00, 0x00, | |
889 | /*A0 ~ s t u v w x */ | |
890 | 0x00, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, | |
891 | /*A8 y z [ */ | |
892 | 0x79, 0x7A, 0x00, 0x00, 0x00, 0x5B, 0x00, 0x00, | |
893 | /*B0 */ | |
894 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
895 | /*B8 ] */ | |
896 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x5D, 0x00, 0x00, | |
897 | /*C0 { A B C D E F G */ | |
898 | 0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, | |
899 | /*C8 H I */ | |
900 | 0x48, 0x49, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
901 | /*D0 } J K L M N O P */ | |
902 | 0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, | |
903 | /*D8 Q R */ | |
904 | 0x51, 0x52, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
905 | /*E0 \ S T U V W X */ | |
906 | 0x5C, 0x00, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, | |
907 | /*E8 Y Z */ | |
908 | 0x59, 0x5A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
909 | /*F0 0 1 2 3 4 5 6 7 */ | |
910 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, | |
911 | /*F8 8 9 */ | |
912 | 0x38, 0x39, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF | |
913 | }; | |
914 | ||
915 | /* ebcdic translation tables needed for 3270 support */ | |
916 | static void | |
917 | i370_ebcdic (unused) | |
650f02e9 | 918 | int unused ATTRIBUTE_UNUSED; |
5b93d8bb AM |
919 | { |
920 | char *p, *end; | |
921 | char delim = 0; | |
922 | size_t nbytes; | |
923 | ||
924 | nbytes = strlen (input_line_pointer); | |
925 | end = input_line_pointer + nbytes; | |
926 | while ('\r' == *end) end --; | |
927 | while ('\n' == *end) end --; | |
928 | ||
929 | delim = *input_line_pointer; | |
930 | if (('\'' == delim) || ('\"' == delim)) { | |
931 | input_line_pointer ++; | |
932 | end = rindex (input_line_pointer, delim); | |
933 | } | |
934 | ||
935 | if (end > input_line_pointer) | |
936 | { | |
937 | nbytes = end - input_line_pointer +1; | |
938 | p = frag_more (nbytes); | |
939 | while (end > input_line_pointer) | |
940 | { | |
bc805888 | 941 | *p = ascebc [(unsigned char) (*input_line_pointer)]; |
5b93d8bb AM |
942 | ++p; ++input_line_pointer; |
943 | } | |
944 | *p = '\0'; | |
945 | } | |
946 | if (delim == *input_line_pointer) ++input_line_pointer; | |
947 | } | |
948 | ||
949 | \f | |
950 | /* stub out a couple of routines */ | |
951 | static void | |
952 | i370_rmode (unused) | |
650f02e9 | 953 | int unused ATTRIBUTE_UNUSED; |
5b93d8bb AM |
954 | { |
955 | as_tsktsk ("rmode ignored"); | |
956 | } | |
957 | ||
958 | static void | |
959 | i370_dsect (sect) | |
960 | int sect; | |
961 | { | |
962 | char *save_line = input_line_pointer; | |
963 | static char section[] = ".data\n"; | |
964 | ||
965 | /* Just pretend this is .section .data */ | |
966 | input_line_pointer = section; | |
967 | obj_elf_section (sect); | |
968 | ||
969 | input_line_pointer = save_line; | |
970 | } | |
971 | ||
972 | static void | |
973 | i370_csect (unused) | |
650f02e9 | 974 | int unused ATTRIBUTE_UNUSED; |
5b93d8bb AM |
975 | { |
976 | as_tsktsk ("csect not supported"); | |
977 | } | |
978 | ||
979 | \f | |
980 | /* DC Define Const is only partially supported. | |
981 | * For samplecode on what to do, look at i370_elf_cons() above. | |
982 | * This code handles pseudoops of the style | |
983 | * DC D'3.141592653' # in sysv4, .double 3.14159265 | |
984 | * DC F'1' # in sysv4, .long 1 | |
985 | */ | |
986 | static void | |
650f02e9 AM |
987 | i370_dc (unused) |
988 | int unused ATTRIBUTE_UNUSED; | |
5b93d8bb AM |
989 | { |
990 | char * p, tmp[50]; | |
991 | int nbytes=0; | |
992 | expressionS exp; | |
993 | char type=0; | |
994 | ||
995 | if (is_it_end_of_statement ()) | |
996 | { | |
997 | demand_empty_rest_of_line (); | |
998 | return; | |
999 | } | |
1000 | ||
1001 | /* figure out the size */ | |
1002 | type = *input_line_pointer++; | |
1003 | switch (type) | |
1004 | { | |
1005 | case 'H': /* 16-bit */ | |
1006 | nbytes = 2; | |
1007 | break; | |
1008 | case 'E': /* 32-bit */ | |
1009 | case 'F': /* 32-bit */ | |
1010 | nbytes = 4; | |
1011 | break; | |
1012 | case 'D': /* 64-bit */ | |
1013 | nbytes = 8; | |
1014 | break; | |
1015 | default: | |
1016 | as_bad ("unsupported DC type"); | |
1017 | return; | |
1018 | } | |
1019 | ||
1020 | /* get rid of pesky quotes */ | |
1021 | if ('\'' == *input_line_pointer) | |
1022 | { | |
1023 | char * close; | |
1024 | ++input_line_pointer; | |
1025 | close = strchr (input_line_pointer, '\''); | |
1026 | if (close) | |
1027 | *close= ' '; | |
1028 | else | |
1029 | as_bad ("missing end-quote"); | |
1030 | } | |
1031 | if ('\"' == *input_line_pointer) | |
1032 | { | |
1033 | char * close; | |
1034 | ++input_line_pointer; | |
1035 | close = strchr (input_line_pointer, '\"'); | |
1036 | if (close) | |
1037 | *close= ' '; | |
1038 | else | |
1039 | as_bad ("missing end-quote"); | |
1040 | } | |
1041 | ||
1042 | switch (type) | |
1043 | { | |
1044 | case 'H': /* 16-bit */ | |
1045 | case 'F': /* 32-bit */ | |
1046 | expression (&exp); | |
1047 | emit_expr (&exp, nbytes); | |
1048 | break; | |
1049 | case 'E': /* 32-bit */ | |
1050 | case 'D': /* 64-bit */ | |
1051 | md_atof (type, tmp, &nbytes); | |
1052 | p = frag_more (nbytes); | |
1053 | memcpy (p, tmp, nbytes); | |
1054 | break; | |
1055 | default: | |
1056 | as_bad ("unsupported DC type"); | |
1057 | return; | |
1058 | } | |
1059 | ||
1060 | demand_empty_rest_of_line (); | |
1061 | } | |
1062 | ||
1063 | \f | |
1064 | /* provide minimal support for DS Define Storage */ | |
1065 | static void | |
1066 | i370_ds (unused) | |
650f02e9 | 1067 | int unused ATTRIBUTE_UNUSED; |
5b93d8bb AM |
1068 | { |
1069 | /* DS 0H or DS 0F or DS 0D */ | |
1070 | if ('0' == *input_line_pointer) | |
1071 | { | |
1072 | int alignment = 0; /* left shift 1<<align */ | |
1073 | input_line_pointer ++; | |
1074 | switch (*input_line_pointer++) | |
1075 | { | |
1076 | case 'H': /* 16-bit */ | |
1077 | alignment = 1; | |
1078 | break; | |
1079 | case 'F': /* 32-bit */ | |
1080 | alignment = 2; | |
1081 | break; | |
1082 | case 'D': /* 64-bit */ | |
1083 | alignment = 3; | |
1084 | break; | |
1085 | default: | |
1086 | as_bad ("unsupported alignment"); | |
1087 | return; | |
1088 | } | |
1089 | frag_align (alignment, 0, 0); | |
1090 | record_alignment (now_seg, alignment); | |
1091 | } | |
1092 | else | |
1093 | { | |
1094 | as_bad ("this DS form not yet supported"); | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* Solaris pseudo op to change to the .rodata section. */ | |
1099 | static void | |
1100 | i370_elf_rdata (sect) | |
1101 | int sect; | |
1102 | { | |
1103 | char *save_line = input_line_pointer; | |
1104 | static char section[] = ".rodata\n"; | |
1105 | ||
1106 | /* Just pretend this is .section .rodata */ | |
1107 | input_line_pointer = section; | |
1108 | obj_elf_section (sect); | |
1109 | ||
1110 | input_line_pointer = save_line; | |
1111 | } | |
1112 | ||
1113 | /* Pseudo op to make file scope bss items */ | |
1114 | static void | |
07726851 | 1115 | i370_elf_lcomm (unused) |
650f02e9 | 1116 | int unused ATTRIBUTE_UNUSED; |
5b93d8bb AM |
1117 | { |
1118 | register char *name; | |
1119 | register char c; | |
1120 | register char *p; | |
1121 | offsetT size; | |
1122 | register symbolS *symbolP; | |
1123 | offsetT align; | |
1124 | segT old_sec; | |
1125 | int old_subsec; | |
1126 | char *pfrag; | |
1127 | int align2; | |
1128 | ||
1129 | name = input_line_pointer; | |
1130 | c = get_symbol_end (); | |
1131 | ||
1132 | /* just after name is now '\0' */ | |
1133 | p = input_line_pointer; | |
1134 | *p = c; | |
1135 | SKIP_WHITESPACE (); | |
1136 | if (*input_line_pointer != ',') | |
1137 | { | |
1138 | as_bad ("Expected comma after symbol-name: rest of line ignored."); | |
1139 | ignore_rest_of_line (); | |
1140 | return; | |
1141 | } | |
1142 | ||
1143 | input_line_pointer++; /* skip ',' */ | |
1144 | if ((size = get_absolute_expression ()) < 0) | |
1145 | { | |
1146 | as_warn (".COMMon length (%ld.) <0! Ignored.", (long) size); | |
1147 | ignore_rest_of_line (); | |
1148 | return; | |
1149 | } | |
1150 | ||
1151 | /* The third argument to .lcomm is the alignment. */ | |
1152 | if (*input_line_pointer != ',') | |
1153 | align = 8; | |
1154 | else | |
1155 | { | |
1156 | ++input_line_pointer; | |
1157 | align = get_absolute_expression (); | |
1158 | if (align <= 0) | |
1159 | { | |
1160 | as_warn ("ignoring bad alignment"); | |
1161 | align = 8; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | *p = 0; | |
1166 | symbolP = symbol_find_or_make (name); | |
1167 | *p = c; | |
1168 | ||
1169 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
1170 | { | |
1171 | as_bad ("Ignoring attempt to re-define symbol `%s'.", | |
1172 | S_GET_NAME (symbolP)); | |
1173 | ignore_rest_of_line (); | |
1174 | return; | |
1175 | } | |
1176 | ||
1177 | if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size) | |
1178 | { | |
1179 | as_bad ("Length of .lcomm \"%s\" is already %ld. Not changed to %ld.", | |
1180 | S_GET_NAME (symbolP), | |
1181 | (long) S_GET_VALUE (symbolP), | |
1182 | (long) size); | |
1183 | ||
1184 | ignore_rest_of_line (); | |
1185 | return; | |
1186 | } | |
1187 | ||
1188 | /* allocate_bss: */ | |
1189 | old_sec = now_seg; | |
1190 | old_subsec = now_subseg; | |
1191 | if (align) | |
1192 | { | |
1193 | /* convert to a power of 2 alignment */ | |
1194 | for (align2 = 0; (align & 1) == 0; align >>= 1, ++align2) | |
1195 | ; | |
1196 | if (align != 1) | |
1197 | { | |
1198 | as_bad ("Common alignment not a power of 2"); | |
1199 | ignore_rest_of_line (); | |
1200 | return; | |
1201 | } | |
1202 | } | |
1203 | else | |
1204 | align2 = 0; | |
1205 | ||
1206 | record_alignment (bss_section, align2); | |
1207 | subseg_set (bss_section, 0); | |
1208 | if (align2) | |
1209 | frag_align (align2, 0, 0); | |
1210 | if (S_GET_SEGMENT (symbolP) == bss_section) | |
1211 | symbol_get_frag (symbolP)->fr_symbol = 0; | |
1212 | symbol_set_frag (symbolP, frag_now); | |
1213 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size, | |
1214 | (char *) 0); | |
1215 | *pfrag = 0; | |
1216 | S_SET_SIZE (symbolP, size); | |
1217 | S_SET_SEGMENT (symbolP, bss_section); | |
1218 | subseg_set (old_sec, old_subsec); | |
1219 | demand_empty_rest_of_line (); | |
1220 | } | |
1221 | ||
1222 | /* Validate any relocations emitted for -mrelocatable, possibly adding | |
1223 | fixups for word relocations in writable segments, so we can adjust | |
1224 | them at runtime. */ | |
1225 | static void | |
1226 | i370_elf_validate_fix (fixp, seg) | |
1227 | fixS *fixp; | |
1228 | segT seg; | |
1229 | { | |
1230 | if (fixp->fx_done || fixp->fx_pcrel) | |
1231 | return; | |
1232 | ||
1233 | switch (shlib) | |
1234 | { | |
1235 | case SHLIB_NONE: | |
1236 | case SHLIB_PIC: | |
1237 | return; | |
1238 | ||
1239 | case SHILB_MRELOCATABLE: | |
1240 | if (fixp->fx_r_type <= BFD_RELOC_UNUSED | |
1241 | && fixp->fx_r_type != BFD_RELOC_16_GOTOFF | |
1242 | && fixp->fx_r_type != BFD_RELOC_HI16_GOTOFF | |
1243 | && fixp->fx_r_type != BFD_RELOC_LO16_GOTOFF | |
1244 | && fixp->fx_r_type != BFD_RELOC_HI16_S_GOTOFF | |
1245 | && fixp->fx_r_type != BFD_RELOC_32_BASEREL | |
1246 | && fixp->fx_r_type != BFD_RELOC_LO16_BASEREL | |
1247 | && fixp->fx_r_type != BFD_RELOC_HI16_BASEREL | |
1248 | && fixp->fx_r_type != BFD_RELOC_HI16_S_BASEREL | |
1249 | && strcmp (segment_name (seg), ".got2") != 0 | |
1250 | && strcmp (segment_name (seg), ".dtors") != 0 | |
1251 | && strcmp (segment_name (seg), ".ctors") != 0 | |
1252 | && strcmp (segment_name (seg), ".fixup") != 0 | |
1253 | && strcmp (segment_name (seg), ".stab") != 0 | |
1254 | && strcmp (segment_name (seg), ".gcc_except_table") != 0 | |
1255 | && strcmp (segment_name (seg), ".ex_shared") != 0) | |
1256 | { | |
1257 | if ((seg->flags & (SEC_READONLY | SEC_CODE)) != 0 | |
1258 | || fixp->fx_r_type != BFD_RELOC_CTOR) | |
1259 | { | |
1260 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1261 | "Relocation cannot be done when using -mrelocatable"); | |
1262 | } | |
1263 | } | |
1264 | return; | |
1265 | } | |
1266 | } | |
1267 | #endif /* OBJ_ELF */ | |
1268 | ||
5b93d8bb AM |
1269 | \f |
1270 | #define LITERAL_POOL_SUPPORT | |
1271 | #ifdef LITERAL_POOL_SUPPORT | |
92774660 | 1272 | /* Provide support for literal pools within the text section. */ |
5b93d8bb AM |
1273 | /* Loosely based on similar code from tc-arm.c */ |
1274 | /* | |
1275 | * We will use four symbols to locate four parts of the literal pool. | |
1276 | * These four sections contain 64,32,16 and 8-bit constants; we use | |
1277 | * four sections so that all memory access can be appropriately aligned. | |
1278 | * That is, we want to avoid mixing these together so that we don't | |
1279 | * waste space padding out to alignments. The four pointers | |
1280 | * longlong_poolP, word_poolP, etc. point to a symbol labeling the | |
1281 | * start of each pool part. | |
1282 | * | |
1283 | * lit_pool_num increments from zero to infinity and uniquely id's | |
1284 | * -- its used to generate the *_poolP symbol name. | |
1285 | */ | |
1286 | ||
1287 | #define MAX_LITERAL_POOL_SIZE 1024 | |
1288 | ||
1289 | typedef struct literalS | |
1290 | { | |
1291 | struct expressionS exp; | |
1292 | char * sym_name; | |
1293 | char size; /* 1,2,4 or 8 */ | |
1294 | short offset; | |
1295 | } literalT; | |
1296 | ||
1297 | literalT literals[MAX_LITERAL_POOL_SIZE]; | |
1298 | int next_literal_pool_place = 0; /* Next free entry in the pool */ | |
1299 | ||
1300 | static symbolS *longlong_poolP = NULL; /* 64-bit pool entries */ | |
1301 | static symbolS *word_poolP = NULL; /* 32-bit pool entries */ | |
1302 | static symbolS *short_poolP = NULL; /* 16-bit pool entries */ | |
1303 | static symbolS *byte_poolP = NULL; /* 8-bit pool entries */ | |
1304 | ||
1305 | static int lit_pool_num = 1; | |
1306 | ||
1307 | /* create a new, empty symbol */ | |
1308 | static symbolS * | |
1309 | symbol_make_empty (void) | |
1310 | { | |
1311 | return symbol_create (FAKE_LABEL_NAME, undefined_section, | |
1312 | (valueT) 0, &zero_address_frag); | |
1313 | } | |
1314 | ||
1315 | /* add an expression to the literal pool */ | |
1316 | static void | |
1317 | add_to_lit_pool (expressionS *exx, char *name, int sz) | |
1318 | { | |
1319 | int lit_count = 0; | |
1320 | int offset_in_pool = 0; | |
1321 | ||
1322 | /* start a new pool, if necessary */ | |
1323 | if (8 == sz && NULL == longlong_poolP) | |
07726851 | 1324 | longlong_poolP = symbol_make_empty (); |
5b93d8bb | 1325 | else if (4 == sz && NULL == word_poolP) |
07726851 | 1326 | word_poolP = symbol_make_empty (); |
5b93d8bb | 1327 | else if (2 == sz && NULL == short_poolP) |
07726851 | 1328 | short_poolP = symbol_make_empty (); |
5b93d8bb | 1329 | else if (1 == sz && NULL == byte_poolP) |
07726851 | 1330 | byte_poolP = symbol_make_empty (); |
5b93d8bb AM |
1331 | |
1332 | /* Check if this literal value is already in the pool: */ | |
1333 | /* hack alert -- we should probably be checking expressions | |
1334 | * of type O_symbol as well ... */ | |
1335 | /* hack alert XXX this is probably(certainly?) broken for O_big, | |
1336 | * which includes 64-bit long-longs ... | |
1337 | */ | |
1338 | while (lit_count < next_literal_pool_place) | |
1339 | { | |
1340 | if (exx->X_op == O_constant | |
1341 | && literals[lit_count].exp.X_op == exx->X_op | |
1342 | && literals[lit_count].exp.X_add_number == exx->X_add_number | |
1343 | && literals[lit_count].exp.X_unsigned == exx->X_unsigned | |
1344 | && literals[lit_count].size == sz) | |
1345 | break; | |
1346 | else if (literals[lit_count].sym_name | |
1347 | && name | |
1348 | && !strcmp (name, literals[lit_count].sym_name)) | |
1349 | break; | |
1350 | if (sz == literals[lit_count].size) | |
1351 | offset_in_pool += sz; | |
1352 | lit_count ++; | |
1353 | } | |
1354 | ||
1355 | if (lit_count == next_literal_pool_place) /* new entry */ | |
1356 | { | |
1357 | if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE) | |
1358 | { | |
07726851 | 1359 | as_bad ("Literal Pool Overflow"); |
5b93d8bb AM |
1360 | } |
1361 | ||
1362 | literals[next_literal_pool_place].exp = *exx; | |
1363 | literals[next_literal_pool_place].size = sz; | |
1364 | literals[next_literal_pool_place].offset = offset_in_pool; | |
1365 | if (name) | |
1366 | { | |
1367 | literals[next_literal_pool_place].sym_name = strdup (name); | |
1368 | } | |
1369 | else | |
1370 | { | |
1371 | literals[next_literal_pool_place].sym_name = NULL; | |
1372 | } | |
1373 | next_literal_pool_place++; | |
1374 | } | |
1375 | ||
0234cb7c KH |
1376 | /* ???_poolP points to the beginning of the literal pool. |
1377 | * X_add_number is the offset from the beginning of the | |
5b93d8bb AM |
1378 | * literal pool to this expr minus the location of the most |
1379 | * recent .using directive. Thus, the grand total value of the | |
1380 | * expression is the distance from .using to the literal. | |
1381 | */ | |
1382 | if (8 == sz) | |
1383 | exx->X_add_symbol = longlong_poolP; | |
1384 | else if (4 == sz) | |
1385 | exx->X_add_symbol = word_poolP; | |
1386 | else if (2 == sz) | |
1387 | exx->X_add_symbol = short_poolP; | |
1388 | else if (1 == sz) | |
1389 | exx->X_add_symbol = byte_poolP; | |
1390 | exx->X_add_number = offset_in_pool; | |
1391 | exx->X_op_symbol = NULL; | |
1392 | ||
1393 | /* If the user has set up a base reg in another section, | |
1394 | * use that; otherwise use the text section. */ | |
1395 | if (0 < i370_using_other_regno) | |
1396 | { | |
1397 | i370_make_relative (exx, &i370_using_other_baseaddr); | |
1398 | } | |
1399 | else | |
1400 | { | |
1401 | i370_make_relative (exx, &i370_using_text_baseaddr); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* The symbol setup for the literal pool is done in two steps. First, | |
1406 | * a symbol that represents the start of the literal pool is created, | |
1407 | * above, in the add_to_pool() routine. This sym ???_poolP. | |
1408 | * However, we don't know what fragment its in until a bit later. | |
1409 | * So we defer the frag_now thing, and the symbol name, until .ltorg time | |
1410 | */ | |
1411 | ||
1412 | /* Can't use symbol_new here, so have to create a symbol and then at | |
1413 | a later date assign it a value. Thats what these functions do */ | |
650f02e9 AM |
1414 | static void symbol_locate |
1415 | PARAMS ((symbolS *, const char *, segT, valueT, fragS *)); | |
1416 | ||
5b93d8bb AM |
1417 | static void |
1418 | symbol_locate (symbolP, name, segment, valu, frag) | |
1419 | symbolS *symbolP; | |
5a38dc70 | 1420 | const char *name; /* It is copied, the caller can modify */ |
5b93d8bb AM |
1421 | segT segment; /* Segment identifier (SEG_<something>) */ |
1422 | valueT valu; /* Symbol value */ | |
1423 | fragS *frag; /* Associated fragment */ | |
1424 | { | |
1425 | size_t name_length; | |
1426 | char *preserved_copy_of_name; | |
1427 | ||
1428 | name_length = strlen (name) + 1; /* +1 for \0 */ | |
1429 | obstack_grow (¬es, name, name_length); | |
1430 | preserved_copy_of_name = obstack_finish (¬es); | |
1431 | ||
1432 | S_SET_NAME (symbolP, preserved_copy_of_name); | |
1433 | ||
1434 | S_SET_SEGMENT (symbolP, segment); | |
1435 | S_SET_VALUE (symbolP, valu); | |
07726851 | 1436 | symbol_clear_list_pointers (symbolP); |
5b93d8bb AM |
1437 | |
1438 | symbol_set_frag (symbolP, frag); | |
1439 | ||
1440 | /* | |
1441 | * Link to end of symbol chain. | |
1442 | */ | |
1443 | { | |
1444 | extern int symbol_table_frozen; | |
1445 | if (symbol_table_frozen) | |
1446 | abort (); | |
1447 | } | |
1448 | ||
1449 | symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); | |
1450 | ||
1451 | obj_symbol_new_hook (symbolP); | |
1452 | ||
1453 | #ifdef tc_symbol_new_hook | |
1454 | tc_symbol_new_hook (symbolP); | |
1455 | #endif | |
1456 | ||
1457 | #define DEBUG_SYMS | |
1458 | #ifdef DEBUG_SYMS | |
1459 | verify_symbol_chain(symbol_rootP, symbol_lastP); | |
1460 | #endif /* DEBUG_SYMS */ | |
1461 | } | |
1462 | ||
1463 | /* i370_addr_offset() will convert operand expressions | |
1464 | * that appear to be absolute into thier base-register | |
1465 | * relative form. These expressions come in two types: | |
1466 | * | |
1467 | * (1) of the form "* + const" * where "*" means | |
1468 | * relative offset since the last using | |
1469 | * i.e. "*" means ".-using_baseaddr" | |
1470 | * | |
1471 | * (2) labels, which are never absolute, but are always | |
1472 | * relative to the last "using". Anything with an alpha | |
1473 | * character is considered to be a label (since symbols | |
1474 | * can never be operands), and since we've already handled | |
1475 | * register operands. For example, "BL .L33" branch low | |
1476 | * to .L33 RX form insn frequently terminates for-loops, | |
1477 | */ | |
b34976b6 | 1478 | static bfd_boolean |
5b93d8bb AM |
1479 | i370_addr_offset (expressionS *exx) |
1480 | { | |
1481 | char *dot, *lab; | |
1482 | int islabel = 0; | |
1483 | int all_digits = 0; | |
1484 | ||
1485 | /* search for a label; anything with an alpha char will do */ | |
1486 | /* local labels consist of N digits followed by either b or f */ | |
1487 | lab = input_line_pointer; | |
1488 | while (*lab && (',' != *lab) && ('(' != *lab)) | |
1489 | { | |
3882b010 | 1490 | if (ISDIGIT (*lab)) |
5b93d8bb AM |
1491 | { |
1492 | all_digits = 1; | |
1493 | } | |
3882b010 | 1494 | else if (ISALPHA (*lab)) |
5b93d8bb AM |
1495 | { |
1496 | if (!all_digits) | |
1497 | { | |
1498 | islabel = 1; | |
1499 | break; | |
1500 | } | |
1501 | else if (('f' == *lab) || ('b' == *lab)) | |
1502 | { | |
1503 | islabel = 1; | |
1504 | break; | |
1505 | } | |
1506 | if (all_digits) | |
1507 | break; | |
1508 | } | |
1509 | else if ('.' != *lab) | |
1510 | break; | |
1511 | ++lab; | |
1512 | } | |
1513 | ||
1514 | /* See if operand has a * in it */ | |
1515 | dot = strchr (input_line_pointer, '*'); | |
1516 | ||
1517 | if (!dot && !islabel) | |
b34976b6 | 1518 | return FALSE; |
5b93d8bb AM |
1519 | |
1520 | /* replace * with . and let expr munch on it. */ | |
1521 | if (dot) | |
1522 | *dot = '.'; | |
1523 | expression (exx); | |
1524 | ||
1525 | /* OK, now we have to subtract the "using" location */ | |
92774660 | 1526 | /* normally branches appear in the text section only... */ |
5b93d8bb AM |
1527 | if (0 == strncmp (now_seg->name, ".text", 5) || 0 > i370_using_other_regno) |
1528 | { | |
1529 | i370_make_relative (exx, &i370_using_text_baseaddr); | |
1530 | } | |
1531 | else | |
1532 | { | |
1533 | i370_make_relative (exx, &i370_using_other_baseaddr); | |
1534 | } | |
1535 | ||
1536 | /* put the * back */ | |
1537 | if (dot) | |
1538 | *dot = '*'; | |
1539 | ||
b34976b6 | 1540 | return TRUE; |
5b93d8bb AM |
1541 | } |
1542 | ||
1543 | /* handle address constants of various sorts */ | |
1544 | /* The currently supported types are | |
1545 | * =A(some_symb) | |
1546 | * =V(some_extern) | |
1547 | * =X'deadbeef' hexadecimal | |
1548 | * =F'1234' 32-bit const int | |
1549 | * =H'1234' 16-bit const int | |
1550 | */ | |
b34976b6 | 1551 | static bfd_boolean |
5b93d8bb AM |
1552 | i370_addr_cons (expressionS *exp) |
1553 | { | |
1554 | char *name; | |
1555 | char *sym_name, delim; | |
1556 | int name_len; | |
1557 | int hex_len=0; | |
1558 | int cons_len=0; | |
1559 | ||
1560 | name = input_line_pointer; | |
1561 | sym_name = input_line_pointer; | |
1562 | /* Find the spelling of the operand */ | |
3882b010 | 1563 | if (name[0] == '=' && ISALPHA (name[1])) |
5b93d8bb AM |
1564 | { |
1565 | name = ++input_line_pointer; | |
1566 | } | |
1567 | else | |
1568 | { | |
b34976b6 | 1569 | return FALSE; |
5b93d8bb AM |
1570 | } |
1571 | switch (name[0]) | |
1572 | { | |
1573 | case 'A': | |
1574 | case 'V': | |
1575 | /* A == address-of */ | |
1576 | /* V == extern */ | |
1577 | ++input_line_pointer; | |
1578 | expression (exp); | |
1579 | ||
1580 | /* we use a simple string name to collapse together | |
1581 | * multiple refrences to the same address literal | |
1582 | */ | |
1583 | name_len = strcspn (sym_name, ", "); | |
1584 | delim = *(sym_name + name_len); | |
1585 | *(sym_name + name_len) = 0x0; | |
1586 | add_to_lit_pool (exp, sym_name, 4); | |
1587 | *(sym_name + name_len) = delim; | |
1588 | ||
1589 | break; | |
1590 | case 'H': | |
1591 | case 'F': | |
1592 | case 'X': | |
1593 | case 'E': /* single-precision float point */ | |
1594 | case 'D': /* double-precision float point */ | |
1595 | ||
1596 | /* H == 16-bit fixed-point const; expression must be const */ | |
1597 | /* F == fixed-point const; expression must be const */ | |
1598 | /* X == fixed-point const; expression must be const */ | |
1599 | if ('H' == name[0]) cons_len = 2; | |
1600 | else if ('F' == name[0]) cons_len = 4; | |
1601 | else if ('X' == name[0]) cons_len = -1; | |
1602 | else if ('E' == name[0]) cons_len = 4; | |
1603 | else if ('D' == name[0]) cons_len = 8; | |
1604 | ||
1605 | /* extract length, if it is present; hack alert -- assume single-digit | |
1606 | * length */ | |
1607 | if ('L' == name[1]) | |
1608 | { | |
1609 | cons_len = name[2] - '0'; /* should work for ascii and ebcdic */ | |
1610 | input_line_pointer += 2; | |
1611 | } | |
1612 | ||
1613 | ++input_line_pointer; | |
1614 | ||
1615 | /* get rid of pesky quotes */ | |
1616 | if ('\'' == *input_line_pointer) | |
1617 | { | |
1618 | char * close; | |
1619 | ++input_line_pointer; | |
1620 | close = strchr (input_line_pointer, '\''); | |
1621 | if (close) | |
1622 | *close= ' '; | |
1623 | else | |
1624 | as_bad ("missing end-quote"); | |
1625 | } | |
1626 | if ('\"' == *input_line_pointer) | |
1627 | { | |
1628 | char * close; | |
1629 | ++input_line_pointer; | |
1630 | close = strchr (input_line_pointer, '\"'); | |
1631 | if (close) | |
1632 | *close= ' '; | |
1633 | else | |
1634 | as_bad ("missing end-quote"); | |
1635 | } | |
1636 | if (('X' == name[0]) || ('E' == name[0]) || ('D' == name[0])) | |
1637 | { | |
1638 | char tmp[50]; | |
1639 | char *save; | |
1640 | ||
1641 | /* The length of hex constants is specified directly with L, | |
1642 | * or implied through the number of hex digits. For example: | |
1643 | * =X'AB' one byte | |
1644 | * =X'abcd' two bytes | |
1645 | * =X'000000AB' four bytes | |
1646 | * =XL4'AB' four bytes, left-padded withn zero | |
1647 | */ | |
1648 | if (('X' == name[0]) && (0 > cons_len)) | |
1649 | { | |
1650 | save = input_line_pointer; | |
1651 | while (*save) | |
1652 | { | |
3882b010 | 1653 | if (ISXDIGIT (*save)) |
5b93d8bb AM |
1654 | hex_len++; |
1655 | save++; | |
1656 | } | |
1657 | cons_len = (hex_len+1) /2; | |
1658 | } | |
0234cb7c | 1659 | /* I believe this works even for =XL8'dada0000beeebaaa' |
5b93d8bb AM |
1660 | * which should parse out to X_op == O_big |
1661 | * Note that floats and doubles get represented as | |
1662 | * 0d3.14159265358979 or 0f 2.7 | |
1663 | */ | |
1664 | tmp[0] = '0'; | |
1665 | tmp[1] = name[0]; | |
1666 | tmp[2] = 0; | |
1667 | strcat (tmp, input_line_pointer); | |
1668 | save = input_line_pointer; | |
1669 | input_line_pointer = tmp; | |
1670 | expression (exp); | |
1671 | input_line_pointer = save + (input_line_pointer-tmp-2); | |
1672 | ||
1673 | /* fix up lengths for floats and doubles */ | |
1674 | if (O_big == exp->X_op) | |
1675 | { | |
1676 | exp->X_add_number = cons_len / CHARS_PER_LITTLENUM; | |
1677 | } | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | expression (exp); | |
1682 | } | |
1683 | /* O_big occurs when more than 4 bytes worth gets parsed */ | |
1684 | if ((exp->X_op != O_constant) && (exp->X_op != O_big)) | |
1685 | { | |
1686 | as_bad ("expression not a constant"); | |
b34976b6 | 1687 | return FALSE; |
5b93d8bb AM |
1688 | } |
1689 | add_to_lit_pool (exp, 0x0, cons_len); | |
1690 | break; | |
1691 | ||
1692 | default: | |
1693 | as_bad ("Unknown/unsupported address literal type"); | |
b34976b6 | 1694 | return FALSE; |
5b93d8bb AM |
1695 | } |
1696 | ||
b34976b6 | 1697 | return TRUE; |
5b93d8bb AM |
1698 | } |
1699 | ||
1700 | \f | |
1701 | /* Dump the contents of the literal pool that we've accumulated so far. | |
1702 | * This aligns the pool to the size of the largest literal in the pool. | |
1703 | */ | |
1704 | ||
1705 | static void | |
1706 | i370_ltorg (ignore) | |
650f02e9 | 1707 | int ignore ATTRIBUTE_UNUSED; |
5b93d8bb AM |
1708 | { |
1709 | int litsize; | |
1710 | int lit_count = 0; | |
1711 | int biggest_literal_size = 0; | |
1712 | int biggest_align = 0; | |
1713 | char pool_name[20]; | |
1714 | ||
1715 | if (strncmp (now_seg->name, ".text", 5)) | |
1716 | { | |
1717 | if (i370_other_section == undefined_section) | |
1718 | { | |
1719 | as_bad (".ltorg without prior .using in section %s", | |
1720 | now_seg->name); | |
1721 | } | |
1722 | if (i370_other_section != now_seg) | |
1723 | { | |
1724 | as_bad (".ltorg in section %s paired to .using in section %s", | |
1725 | now_seg->name, i370_other_section->name); | |
1726 | } | |
1727 | } | |
1728 | if (! longlong_poolP | |
1729 | && ! word_poolP | |
1730 | && ! short_poolP | |
1731 | && ! byte_poolP) | |
1732 | { | |
1733 | /* Nothing to do */ | |
1734 | /* as_tsktsk ("Nothing to put in the pool\n"); */ | |
1735 | return; | |
1736 | } | |
1737 | ||
1738 | /* find largest literal .. 2 4 or 8 */ | |
1739 | lit_count = 0; | |
1740 | while (lit_count < next_literal_pool_place) | |
1741 | { | |
1742 | if (biggest_literal_size < literals[lit_count].size) | |
1743 | biggest_literal_size = literals[lit_count].size; | |
1744 | lit_count ++; | |
1745 | } | |
1746 | if (1 == biggest_literal_size) biggest_align = 0; | |
1747 | else if (2 == biggest_literal_size) biggest_align = 1; | |
1748 | else if (4 == biggest_literal_size) biggest_align = 2; | |
1749 | else if (8 == biggest_literal_size) biggest_align = 3; | |
1750 | else as_bad ("bad alignment of %d bytes in literal pool", biggest_literal_size); | |
1751 | if (0 == biggest_align) biggest_align = 1; | |
1752 | ||
5b93d8bb AM |
1753 | /* Align pool for short, word, double word accesses */ |
1754 | frag_align (biggest_align, 0, 0); | |
1755 | record_alignment (now_seg, biggest_align); | |
1756 | ||
1757 | /* Note that the gas listing will print only the first five | |
1758 | * entries in the pool .... wonder how to make it print more ... | |
1759 | */ | |
92774660 | 1760 | /* output largest literals first, then the smaller ones. */ |
5b93d8bb AM |
1761 | for (litsize=8; litsize; litsize /=2) |
1762 | { | |
1763 | symbolS *current_poolP = NULL; | |
1764 | switch (litsize) | |
1765 | { | |
1766 | case 8: | |
1767 | current_poolP = longlong_poolP; break; | |
1768 | case 4: | |
1769 | current_poolP = word_poolP; break; | |
1770 | case 2: | |
1771 | current_poolP = short_poolP; break; | |
1772 | case 1: | |
1773 | current_poolP = byte_poolP; break; | |
1774 | default: | |
1775 | as_bad ("bad literal size\n"); | |
1776 | } | |
1777 | if (NULL == current_poolP) | |
1778 | continue; | |
1779 | sprintf (pool_name, ".LITP%01d%06d", litsize, lit_pool_num); | |
1780 | symbol_locate (current_poolP, pool_name, now_seg, | |
1781 | (valueT) frag_now_fix (), frag_now); | |
1782 | symbol_table_insert (current_poolP); | |
1783 | ||
1784 | lit_count = 0; | |
1785 | while (lit_count < next_literal_pool_place) | |
1786 | { | |
1787 | if (litsize == literals[lit_count].size) | |
1788 | { | |
1789 | #define EMIT_ADDR_CONS_SYMBOLS | |
1790 | #ifdef EMIT_ADDR_CONS_SYMBOLS | |
1791 | /* create a bogus symbol, add it to the pool ... | |
0234cb7c | 1792 | * For the most part, I think this is a useless exercise, |
5b93d8bb AM |
1793 | * except that having these symbol names in the objects |
1794 | * is vaguely useful for debugging ... | |
1795 | */ | |
1796 | if (literals[lit_count].sym_name) | |
1797 | { | |
07726851 | 1798 | symbolS * symP = symbol_make_empty (); |
5b93d8bb AM |
1799 | symbol_locate (symP, literals[lit_count].sym_name, now_seg, |
1800 | (valueT) frag_now_fix (), frag_now); | |
1801 | symbol_table_insert (symP); | |
1802 | } | |
1803 | #endif /* EMIT_ADDR_CONS_SYMBOLS */ | |
1804 | ||
1805 | emit_expr (&(literals[lit_count].exp), literals[lit_count].size); | |
1806 | } | |
1807 | lit_count ++; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | next_literal_pool_place = 0; | |
1812 | longlong_poolP = NULL; | |
1813 | word_poolP = NULL; | |
1814 | short_poolP = NULL; | |
1815 | byte_poolP = NULL; | |
1816 | lit_pool_num++; | |
1817 | } | |
1818 | ||
1819 | #endif /* LITERAL_POOL_SUPPORT */ | |
1820 | ||
1821 | \f | |
1822 | /* add support for the HLASM-like USING directive to indicate | |
1823 | * the base register to use ... we don't support the full | |
1824 | * hlasm semantics for this ... we merely pluck a base address | |
1825 | * and a register number out. We print a warning if using is | |
1826 | * called multiple times. I suppose we should check to see | |
1827 | * if the regno is valid ... | |
1828 | */ | |
1829 | static void | |
1830 | i370_using (ignore) | |
650f02e9 | 1831 | int ignore ATTRIBUTE_UNUSED; |
5b93d8bb AM |
1832 | { |
1833 | expressionS ex, baseaddr; | |
1834 | int iregno; | |
1835 | char *star; | |
1836 | ||
1837 | /* if "*" appears in a using, it means "." */ | |
92774660 | 1838 | /* replace it with "." so that expr doesn't get confused. */ |
5b93d8bb AM |
1839 | star = strchr (input_line_pointer, '*'); |
1840 | if (star) | |
1841 | *star = '.'; | |
1842 | ||
1843 | /* the first arg to using will usually be ".", but it can | |
0234cb7c | 1844 | * be a more complex expression too ... */ |
5b93d8bb AM |
1845 | expression (&baseaddr); |
1846 | if (star) | |
1847 | *star = '*'; | |
1848 | if (O_constant != baseaddr.X_op | |
1849 | && O_symbol != baseaddr.X_op | |
1850 | && O_uminus != baseaddr.X_op) | |
1851 | { | |
1852 | as_bad (".using: base address expression illegal or too complex"); | |
1853 | } | |
1854 | ||
1855 | if (*input_line_pointer != '\0') ++input_line_pointer; | |
1856 | ||
1857 | /* the second arg to using had better be a register */ | |
1858 | register_name (&ex); | |
1859 | demand_empty_rest_of_line (); | |
1860 | iregno = ex.X_add_number; | |
1861 | ||
1862 | if (0 == strncmp (now_seg->name, ".text", 5)) | |
1863 | { | |
1864 | i370_using_text_baseaddr = baseaddr; | |
1865 | i370_using_text_regno = iregno; | |
1866 | } | |
1867 | else | |
1868 | { | |
1869 | i370_using_other_baseaddr = baseaddr; | |
1870 | i370_using_other_regno = iregno; | |
1871 | i370_other_section = now_seg; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | static void | |
1876 | i370_drop (ignore) | |
650f02e9 | 1877 | int ignore ATTRIBUTE_UNUSED; |
5b93d8bb AM |
1878 | { |
1879 | expressionS ex; | |
1880 | int iregno; | |
1881 | ||
1882 | register_name (&ex); | |
1883 | demand_empty_rest_of_line (); | |
1884 | iregno = ex.X_add_number; | |
1885 | ||
1886 | if (0 == strncmp (now_seg->name, ".text", 5)) | |
1887 | { | |
1888 | if (iregno != i370_using_text_regno) | |
1889 | { | |
1890 | as_bad ("droping register %d in section %s does not match using register %d", | |
1891 | iregno, now_seg->name, i370_using_text_regno); | |
1892 | } | |
1893 | i370_using_text_regno = -1; | |
1894 | i370_using_text_baseaddr.X_op = O_absent; | |
1895 | } | |
1896 | else | |
1897 | { | |
1898 | if (iregno != i370_using_other_regno) | |
1899 | { | |
1900 | as_bad ("droping register %d in section %s does not match using register %d", | |
1901 | iregno, now_seg->name, i370_using_other_regno); | |
1902 | } | |
1903 | if (i370_other_section != now_seg) | |
1904 | { | |
1905 | as_bad ("droping register %d in section %s previously used in section %s", | |
1906 | iregno, now_seg->name, i370_other_section->name); | |
1907 | } | |
1908 | i370_using_other_regno = -1; | |
1909 | i370_using_other_baseaddr.X_op = O_absent; | |
1910 | i370_other_section = undefined_section; | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | /* Make the first argument an address-relative expression | |
1915 | * by subtracting the second argument. | |
1916 | */ | |
1917 | static void | |
1918 | i370_make_relative (expressionS *exx, expressionS *baseaddr) | |
1919 | { | |
1920 | ||
1921 | if (O_constant == baseaddr->X_op) | |
1922 | { | |
1923 | exx->X_op = O_symbol; | |
1924 | exx->X_add_number -= baseaddr->X_add_number; | |
1925 | } | |
1926 | else if (O_symbol == baseaddr->X_op) | |
1927 | { | |
1928 | exx->X_op = O_subtract; | |
1929 | exx->X_op_symbol = baseaddr->X_add_symbol; | |
1930 | exx->X_add_number -= baseaddr->X_add_number; | |
1931 | } | |
1932 | else if (O_uminus == baseaddr->X_op) | |
1933 | { | |
1934 | exx->X_op = O_add; | |
1935 | exx->X_op_symbol = baseaddr->X_add_symbol; | |
1936 | exx->X_add_number += baseaddr->X_add_number; | |
1937 | } | |
1938 | else | |
1939 | { | |
1940 | as_bad ("Missing or bad .using directive"); | |
1941 | } | |
1942 | } | |
1943 | \f | |
1944 | /* We need to keep a list of fixups. We can't simply generate them as | |
1945 | we go, because that would require us to first create the frag, and | |
1946 | that would screw up references to ``.''. */ | |
1947 | ||
1948 | struct i370_fixup | |
1949 | { | |
1950 | expressionS exp; | |
1951 | int opindex; | |
1952 | bfd_reloc_code_real_type reloc; | |
1953 | }; | |
1954 | ||
1955 | #define MAX_INSN_FIXUPS (5) | |
1956 | ||
1957 | /* This routine is called for each instruction to be assembled. */ | |
1958 | ||
1959 | void | |
1960 | md_assemble (str) | |
1961 | char *str; | |
1962 | { | |
1963 | char *s, *opcode_str; | |
1964 | const struct i370_opcode *opcode; | |
1965 | i370_insn_t insn; | |
1966 | const unsigned char *opindex_ptr; | |
1967 | int have_optional_index, have_optional_basereg, have_optional_reg; | |
1968 | int skip_optional_index, skip_optional_basereg, skip_optional_reg; | |
1969 | int use_text=0, use_other=0; | |
1970 | int off_by_one; | |
1971 | struct i370_fixup fixups[MAX_INSN_FIXUPS]; | |
1972 | int fc; | |
1973 | char *f; | |
1974 | int i; | |
1975 | #ifdef OBJ_ELF | |
1976 | bfd_reloc_code_real_type reloc; | |
1977 | #endif | |
1978 | ||
1979 | /* Get the opcode. */ | |
3882b010 | 1980 | for (s = str; *s != '\0' && ! ISSPACE (*s); s++) |
5b93d8bb AM |
1981 | ; |
1982 | if (*s != '\0') | |
1983 | *s++ = '\0'; | |
1984 | opcode_str = str; | |
1985 | ||
1986 | /* Look up the opcode in the hash table. */ | |
1987 | opcode = (const struct i370_opcode *) hash_find (i370_hash, str); | |
1988 | if (opcode == (const struct i370_opcode *) NULL) | |
1989 | { | |
1990 | const struct i370_macro *macro; | |
1991 | ||
1992 | assert (i370_macro_hash); | |
1993 | macro = (const struct i370_macro *) hash_find (i370_macro_hash, str); | |
1994 | if (macro == (const struct i370_macro *) NULL) | |
1995 | as_bad ("Unrecognized opcode: `%s'", str); | |
1996 | else | |
1997 | i370_macro (s, macro); | |
1998 | ||
1999 | return; | |
2000 | } | |
2001 | ||
2002 | insn = opcode->opcode; | |
2003 | ||
2004 | str = s; | |
3882b010 | 2005 | while (ISSPACE (*str)) |
5b93d8bb AM |
2006 | ++str; |
2007 | ||
2008 | /* I370 operands are either expressions or address constants. | |
2009 | Many operand types are optional. The optional operands | |
2010 | are always surrounded by parens, and are used to denote the base | |
2011 | register ... e.g. "A R1, D2" or "A R1, D2(,B2) as opposed to | |
2012 | the fully-formed "A R1, D2(X2,B2)". Note also the = sign, | |
2013 | such as A R1,=A(i) where the address-of operator =A implies | |
2014 | use of both a base register, and a missing index register. | |
2015 | ||
2016 | So, before we start seriously parsing the operands, we check | |
2017 | to see if we have an optional operand, and, if we do, we count | |
2018 | the number of commas to see which operand should be omitted. */ | |
2019 | ||
2020 | have_optional_index = have_optional_basereg = have_optional_reg = 0; | |
2021 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
2022 | { | |
2023 | const struct i370_operand *operand; | |
2024 | operand = &i370_operands[*opindex_ptr]; | |
2025 | if ((operand->flags & I370_OPERAND_INDEX) != 0) | |
2026 | have_optional_index = 1; | |
2027 | if ((operand->flags & I370_OPERAND_BASE) != 0) | |
2028 | have_optional_basereg = 1; | |
2029 | if ((operand->flags & I370_OPERAND_OPTIONAL) != 0) | |
2030 | have_optional_reg = 1; | |
2031 | } | |
2032 | ||
2033 | skip_optional_index = skip_optional_basereg = skip_optional_reg = 0; | |
2034 | if (have_optional_index || have_optional_basereg) | |
2035 | { | |
2036 | unsigned int opcount, nwanted; | |
2037 | ||
2038 | /* There is an optional operand. Count the number of | |
2039 | commas and open-parens in the input line. */ | |
2040 | if (*str == '\0') | |
2041 | opcount = 0; | |
2042 | else | |
2043 | { | |
2044 | opcount = 1; | |
2045 | s = str; | |
2046 | while ((s = strpbrk (s, ",(=")) != (char *) NULL) | |
2047 | { | |
2048 | ++opcount; | |
2049 | ++s; | |
2050 | if (',' == *s) ++s; /* avoid counting things like (, */ | |
2051 | if ('=' == *s) { ++s; --opcount; } | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | /* If there are fewer operands in the line then are called | |
2056 | for by the instruction, we want to skip the optional | |
2057 | operand. */ | |
2058 | nwanted = strlen (opcode->operands); | |
2059 | if (have_optional_index) | |
2060 | { | |
2061 | if (opcount < nwanted) | |
2062 | skip_optional_index = 1; | |
2063 | if (have_optional_basereg && ((opcount+1) < nwanted)) | |
2064 | skip_optional_basereg = 1; | |
2065 | if (have_optional_reg && ((opcount+1) < nwanted)) | |
2066 | skip_optional_reg = 1; | |
2067 | } | |
2068 | else | |
2069 | { | |
2070 | if (have_optional_basereg && (opcount < nwanted)) | |
2071 | skip_optional_basereg = 1; | |
2072 | if (have_optional_reg && (opcount < nwanted)) | |
2073 | skip_optional_reg = 1; | |
2074 | } | |
2075 | } | |
2076 | ||
2077 | /* Perform some off-by-one hacks on the length field of certain instructions. | |
2078 | * Its such a shame to have to do this, but the problem is that HLASM got | |
2079 | * defined so that the lengths differ by one from the actual machine instructions. | |
2080 | * this code should probably be moved to a special inster-operand routine. | |
2081 | * Sigh. Affected instructions are Compare Logical, Move and Exclusive OR | |
2082 | * hack alert -- aren't *all* SS instructions affected ?? | |
2083 | */ | |
2084 | off_by_one = 0; | |
2085 | if (0 == strcasecmp ("CLC", opcode->name) | |
2086 | || 0 == strcasecmp ("ED", opcode->name) | |
2087 | || 0 == strcasecmp ("EDMK", opcode->name) | |
2088 | || 0 == strcasecmp ("MVC", opcode->name) | |
2089 | || 0 == strcasecmp ("MVCIN", opcode->name) | |
2090 | || 0 == strcasecmp ("MVN", opcode->name) | |
2091 | || 0 == strcasecmp ("MVZ", opcode->name) | |
2092 | || 0 == strcasecmp ("NC", opcode->name) | |
2093 | || 0 == strcasecmp ("OC", opcode->name) | |
2094 | || 0 == strcasecmp ("XC", opcode->name)) | |
2095 | off_by_one = 1; | |
2096 | ||
2097 | /* Gather the operands. */ | |
2098 | fc = 0; | |
2099 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
2100 | { | |
2101 | const struct i370_operand *operand; | |
2102 | const char *errmsg; | |
2103 | char *hold; | |
2104 | expressionS ex; | |
2105 | ||
2106 | operand = &i370_operands[*opindex_ptr]; | |
2107 | errmsg = NULL; | |
2108 | ||
2109 | /* If this is an index operand, and we are skipping it, | |
2110 | just insert a zero. */ | |
2111 | if (skip_optional_index && | |
2112 | ((operand->flags & I370_OPERAND_INDEX) != 0)) | |
2113 | { | |
2114 | insn = i370_insert_operand (insn, operand, 0); | |
2115 | continue; | |
2116 | } | |
2117 | ||
2118 | /* If this is the base operand, and we are skipping it, | |
2119 | just insert the current using basreg. */ | |
2120 | if (skip_optional_basereg && | |
2121 | ((operand->flags & I370_OPERAND_BASE) != 0)) | |
2122 | { | |
2123 | int basereg = -1; | |
2124 | if (use_text) | |
2125 | { | |
2126 | if (0 == strncmp (now_seg->name, ".text", 5) | |
2127 | || 0 > i370_using_other_regno) | |
2128 | { | |
2129 | basereg = i370_using_text_regno; | |
2130 | } | |
2131 | else | |
2132 | { | |
2133 | basereg = i370_using_other_regno; | |
2134 | } | |
2135 | } | |
2136 | else if (use_other) | |
2137 | { | |
2138 | if (0 > i370_using_other_regno) | |
2139 | { | |
2140 | basereg = i370_using_text_regno; | |
2141 | } | |
2142 | else | |
2143 | { | |
2144 | basereg = i370_using_other_regno; | |
2145 | } | |
2146 | } | |
2147 | if (0 > basereg) | |
2148 | { | |
2149 | as_bad ("not using any base register"); | |
2150 | } | |
2151 | insn = i370_insert_operand (insn, operand, basereg); | |
2152 | continue; | |
2153 | } | |
2154 | ||
2155 | /* If this is an optional operand, and we are skipping it, | |
2156 | Use zero (since a non-zero value would denote a register) */ | |
2157 | if (skip_optional_reg | |
2158 | && ((operand->flags & I370_OPERAND_OPTIONAL) != 0)) | |
2159 | { | |
2160 | insn = i370_insert_operand (insn, operand, 0); | |
2161 | continue; | |
2162 | } | |
2163 | ||
2164 | /* Gather the operand. */ | |
2165 | hold = input_line_pointer; | |
2166 | input_line_pointer = str; | |
2167 | ||
92774660 | 2168 | /* register names are only allowed where there are registers ... */ |
5b93d8bb AM |
2169 | if ((operand->flags & I370_OPERAND_GPR) != 0) |
2170 | { | |
2171 | /* quickie hack to get past things like (,r13) */ | |
2172 | if (skip_optional_index && (',' == *input_line_pointer)) | |
2173 | { | |
2174 | *input_line_pointer = ' '; | |
2175 | input_line_pointer ++; | |
2176 | } | |
2177 | if (! register_name (&ex)) | |
2178 | { | |
2179 | as_bad ("expecting a register for operand %d", | |
2180 | opindex_ptr - opcode->operands + 1); | |
2181 | } | |
2182 | } | |
2183 | ||
b6ff326e | 2184 | /* Check for an address constant expression. */ |
5b93d8bb | 2185 | /* We will put PSW-relative addresses in the text section, |
0234cb7c | 2186 | * and address literals in the .data (or other) section. */ |
5b93d8bb AM |
2187 | else if (i370_addr_cons (&ex)) |
2188 | use_other=1; | |
2189 | else if (i370_addr_offset (&ex)) | |
2190 | use_text=1; | |
2191 | else expression (&ex); | |
2192 | ||
2193 | str = input_line_pointer; | |
2194 | input_line_pointer = hold; | |
2195 | ||
2196 | /* perform some off-by-one hacks on the length field of certain instructions. | |
2197 | * Its such a shame to have to do this, but the problem is that HLASM got | |
2198 | * defined so that the programmer specifies a length that is one greater | |
2199 | * than what the machine instruction wants. | |
2200 | * Sigh. | |
2201 | */ | |
2202 | if (off_by_one && (0 == strcasecmp ("SS L", operand->name))) | |
2203 | { | |
2204 | ex.X_add_number --; | |
2205 | } | |
2206 | ||
2207 | if (ex.X_op == O_illegal) | |
2208 | as_bad ("illegal operand"); | |
2209 | else if (ex.X_op == O_absent) | |
2210 | as_bad ("missing operand"); | |
2211 | else if (ex.X_op == O_register) | |
2212 | { | |
2213 | insn = i370_insert_operand (insn, operand, ex.X_add_number); | |
2214 | } | |
2215 | else if (ex.X_op == O_constant) | |
2216 | { | |
2217 | #ifdef OBJ_ELF | |
2218 | /* Allow @HA, @L, @H on constants. | |
2219 | * Well actually, no we don't; there really don't make sense | |
2220 | * (at least not to me) for the i370. However, this code is | |
92774660 | 2221 | * left here for any dubious future expansion reasons ... */ |
5b93d8bb AM |
2222 | char *orig_str = str; |
2223 | ||
2224 | if ((reloc = i370_elf_suffix (&str, &ex)) != BFD_RELOC_UNUSED) | |
2225 | switch (reloc) | |
2226 | { | |
2227 | default: | |
2228 | str = orig_str; | |
2229 | break; | |
2230 | ||
2231 | case BFD_RELOC_LO16: | |
2232 | /* X_unsigned is the default, so if the user has done | |
2233 | something which cleared it, we always produce a | |
2234 | signed value. */ | |
2235 | ex.X_add_number = (((ex.X_add_number & 0xffff) | |
2236 | ^ 0x8000) | |
2237 | - 0x8000); | |
2238 | break; | |
2239 | ||
2240 | case BFD_RELOC_HI16: | |
2241 | ex.X_add_number = (ex.X_add_number >> 16) & 0xffff; | |
2242 | break; | |
2243 | ||
2244 | case BFD_RELOC_HI16_S: | |
2245 | ex.X_add_number = (((ex.X_add_number >> 16) & 0xffff) | |
2246 | + ((ex.X_add_number >> 15) & 1)); | |
2247 | break; | |
2248 | } | |
2249 | #endif | |
2250 | insn = i370_insert_operand (insn, operand, ex.X_add_number); | |
2251 | } | |
2252 | #ifdef OBJ_ELF | |
2253 | else if ((reloc = i370_elf_suffix (&str, &ex)) != BFD_RELOC_UNUSED) | |
2254 | { | |
2255 | as_tsktsk ("md_assemble(): suffixed relocations not supported\n"); | |
2256 | ||
2257 | /* We need to generate a fixup for this expression. */ | |
2258 | if (fc >= MAX_INSN_FIXUPS) | |
2259 | as_fatal ("too many fixups"); | |
2260 | fixups[fc].exp = ex; | |
2261 | fixups[fc].opindex = 0; | |
2262 | fixups[fc].reloc = reloc; | |
2263 | ++fc; | |
2264 | } | |
2265 | #endif /* OBJ_ELF */ | |
2266 | ||
2267 | else | |
2268 | { | |
2269 | /* We need to generate a fixup for this expression. */ | |
2270 | /* Typically, the expression will just be a symbol ... | |
2271 | * printf ("insn %s needs fixup for %s \n", | |
2272 | * opcode->name, ex.X_add_symbol->bsym->name); | |
2273 | */ | |
2274 | ||
2275 | if (fc >= MAX_INSN_FIXUPS) | |
2276 | as_fatal ("too many fixups"); | |
2277 | fixups[fc].exp = ex; | |
2278 | fixups[fc].opindex = *opindex_ptr; | |
2279 | fixups[fc].reloc = BFD_RELOC_UNUSED; | |
2280 | ++fc; | |
2281 | } | |
2282 | ||
2283 | /* skip over delimiter (close paren, or comma) */ | |
2284 | if ((')' == *str) && (',' == *(str+1))) | |
2285 | ++str; | |
2286 | if (*str != '\0') | |
2287 | ++str; | |
2288 | } | |
2289 | ||
3882b010 | 2290 | while (ISSPACE (*str)) |
5b93d8bb AM |
2291 | ++str; |
2292 | ||
2293 | if (*str != '\0') | |
2294 | as_bad ("junk at end of line: `%s'", str); | |
2295 | ||
2296 | /* Write out the instruction. */ | |
2297 | f = frag_more (opcode->len); | |
2298 | if (4 >= opcode->len) | |
2299 | { | |
2300 | md_number_to_chars (f, insn.i[0], opcode->len); | |
2301 | } | |
2302 | else | |
2303 | { | |
2304 | md_number_to_chars (f, insn.i[0], 4); | |
2305 | if (6 == opcode->len) | |
2306 | { | |
2307 | md_number_to_chars ((f+4), ((insn.i[1])>>16), 2); | |
2308 | } | |
2309 | else | |
2310 | { | |
2311 | /* not used --- don't have any 8 byte instructions */ | |
2312 | as_bad ("Internal Error: bad instruction length"); | |
2313 | md_number_to_chars ((f+4), insn.i[1], opcode->len -4); | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | /* Create any fixups. At this point we do not use a | |
2318 | bfd_reloc_code_real_type, but instead just use the | |
2319 | BFD_RELOC_UNUSED plus the operand index. This lets us easily | |
2320 | handle fixups for any operand type, although that is admittedly | |
2321 | not a very exciting feature. We pick a BFD reloc type in | |
94f592af | 2322 | md_apply_fix3. */ |
5b93d8bb AM |
2323 | for (i = 0; i < fc; i++) |
2324 | { | |
2325 | const struct i370_operand *operand; | |
2326 | ||
2327 | operand = &i370_operands[fixups[i].opindex]; | |
2328 | if (fixups[i].reloc != BFD_RELOC_UNUSED) | |
2329 | { | |
2330 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); | |
2331 | int size; | |
2332 | fixS *fixP; | |
2333 | ||
2334 | if (!reloc_howto) | |
2335 | abort (); | |
2336 | ||
2337 | size = bfd_get_reloc_size (reloc_howto); | |
2338 | ||
2339 | if (size < 1 || size > 4) | |
bc805888 | 2340 | abort (); |
5b93d8bb AM |
2341 | |
2342 | printf (" gwana doo fixup %d \n", i); | |
2343 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal, size, | |
2344 | &fixups[i].exp, reloc_howto->pc_relative, | |
2345 | fixups[i].reloc); | |
2346 | ||
2347 | /* Turn off complaints that the addend is too large for things like | |
2348 | foo+100000@ha. */ | |
2349 | switch (fixups[i].reloc) | |
2350 | { | |
2351 | case BFD_RELOC_16_GOTOFF: | |
2352 | case BFD_RELOC_LO16: | |
2353 | case BFD_RELOC_HI16: | |
2354 | case BFD_RELOC_HI16_S: | |
2355 | fixP->fx_no_overflow = 1; | |
2356 | break; | |
2357 | default: | |
2358 | break; | |
2359 | } | |
2360 | } | |
2361 | else | |
2362 | { | |
2363 | fix_new_exp (frag_now, f - frag_now->fr_literal, opcode->len, | |
2364 | &fixups[i].exp, | |
2365 | (operand->flags & I370_OPERAND_RELATIVE) != 0, | |
2366 | ((bfd_reloc_code_real_type) | |
2367 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
2368 | } | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | /* Handle a macro. Gather all the operands, transform them as | |
2373 | described by the macro, and call md_assemble recursively. All the | |
2374 | operands are separated by commas; we don't accept parentheses | |
2375 | around operands here. */ | |
2376 | ||
2377 | static void | |
2378 | i370_macro (str, macro) | |
2379 | char *str; | |
2380 | const struct i370_macro *macro; | |
2381 | { | |
2382 | char *operands[10]; | |
2383 | unsigned int count; | |
2384 | char *s; | |
2385 | unsigned int len; | |
2386 | const char *format; | |
2387 | int arg; | |
2388 | char *send; | |
2389 | char *complete; | |
2390 | ||
2391 | /* Gather the users operands into the operands array. */ | |
2392 | count = 0; | |
2393 | s = str; | |
2394 | while (1) | |
2395 | { | |
2396 | if (count >= sizeof operands / sizeof operands[0]) | |
2397 | break; | |
2398 | operands[count++] = s; | |
2399 | s = strchr (s, ','); | |
2400 | if (s == (char *) NULL) | |
2401 | break; | |
2402 | *s++ = '\0'; | |
2403 | } | |
2404 | ||
2405 | if (count != macro->operands) | |
2406 | { | |
2407 | as_bad ("wrong number of operands"); | |
2408 | return; | |
2409 | } | |
2410 | ||
2411 | /* Work out how large the string must be (the size is unbounded | |
2412 | because it includes user input). */ | |
2413 | len = 0; | |
2414 | format = macro->format; | |
2415 | while (*format != '\0') | |
2416 | { | |
2417 | if (*format != '%') | |
2418 | { | |
2419 | ++len; | |
2420 | ++format; | |
2421 | } | |
2422 | else | |
2423 | { | |
2424 | arg = strtol (format + 1, &send, 10); | |
2425 | know (send != format && arg >= 0 && arg < count); | |
2426 | len += strlen (operands[arg]); | |
2427 | format = send; | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | /* Put the string together. */ | |
2432 | complete = s = (char *) alloca (len + 1); | |
2433 | format = macro->format; | |
2434 | while (*format != '\0') | |
2435 | { | |
2436 | if (*format != '%') | |
2437 | *s++ = *format++; | |
2438 | else | |
2439 | { | |
2440 | arg = strtol (format + 1, &send, 10); | |
2441 | strcpy (s, operands[arg]); | |
2442 | s += strlen (s); | |
2443 | format = send; | |
2444 | } | |
2445 | } | |
2446 | *s = '\0'; | |
2447 | ||
2448 | /* Assemble the constructed instruction. */ | |
2449 | md_assemble (complete); | |
2450 | } | |
5b93d8bb AM |
2451 | \f |
2452 | /* Pseudo-op handling. */ | |
2453 | ||
2454 | /* The .byte pseudo-op. This is similar to the normal .byte | |
2455 | pseudo-op, but it can also take a single ASCII string. */ | |
2456 | ||
2457 | static void | |
2458 | i370_byte (ignore) | |
650f02e9 | 2459 | int ignore ATTRIBUTE_UNUSED; |
5b93d8bb AM |
2460 | { |
2461 | if (*input_line_pointer != '\"') | |
2462 | { | |
2463 | cons (1); | |
2464 | return; | |
2465 | } | |
2466 | ||
2467 | /* Gather characters. A real double quote is doubled. Unusual | |
2468 | characters are not permitted. */ | |
2469 | ++input_line_pointer; | |
2470 | while (1) | |
2471 | { | |
2472 | char c; | |
2473 | ||
2474 | c = *input_line_pointer++; | |
2475 | ||
2476 | if (c == '\"') | |
2477 | { | |
2478 | if (*input_line_pointer != '\"') | |
2479 | break; | |
2480 | ++input_line_pointer; | |
2481 | } | |
2482 | ||
2483 | FRAG_APPEND_1_CHAR (c); | |
2484 | } | |
2485 | ||
2486 | demand_empty_rest_of_line (); | |
2487 | } | |
2488 | \f | |
2489 | /* The .tc pseudo-op. This is used when generating XCOFF and ELF. | |
2490 | This takes two or more arguments. | |
2491 | ||
2492 | When generating XCOFF output, the first argument is the name to | |
2493 | give to this location in the toc; this will be a symbol with class | |
2494 | TC. The rest of the arguments are 4 byte values to actually put at | |
2495 | this location in the TOC; often there is just one more argument, a | |
1049f94e | 2496 | relocatable symbol reference. |
5b93d8bb AM |
2497 | |
2498 | When not generating XCOFF output, the arguments are the same, but | |
2499 | the first argument is simply ignored. */ | |
2500 | ||
2501 | static void | |
2502 | i370_tc (ignore) | |
650f02e9 | 2503 | int ignore ATTRIBUTE_UNUSED; |
5b93d8bb AM |
2504 | { |
2505 | ||
2506 | /* Skip the TOC symbol name. */ | |
2507 | while (is_part_of_name (*input_line_pointer) | |
2508 | || *input_line_pointer == '[' | |
2509 | || *input_line_pointer == ']' | |
2510 | || *input_line_pointer == '{' | |
2511 | || *input_line_pointer == '}') | |
2512 | ++input_line_pointer; | |
2513 | ||
2514 | /* Align to a four byte boundary. */ | |
2515 | frag_align (2, 0, 0); | |
2516 | record_alignment (now_seg, 2); | |
2517 | ||
2518 | if (*input_line_pointer != ',') | |
2519 | demand_empty_rest_of_line (); | |
2520 | else | |
2521 | { | |
2522 | ++input_line_pointer; | |
2523 | cons (4); | |
2524 | } | |
2525 | } | |
2526 | \f | |
2527 | /* Turn a string in input_line_pointer into a floating point constant | |
bc0d738a NC |
2528 | of type TYPE, and store the appropriate bytes in *LITP. The number |
2529 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
5b93d8bb AM |
2530 | returned, or NULL on OK. */ |
2531 | ||
2532 | char * | |
2533 | md_atof (type, litp, sizep) | |
2534 | int type; | |
2535 | char *litp; | |
2536 | int *sizep; | |
2537 | { | |
2538 | int prec; | |
2539 | LITTLENUM_TYPE words[4]; | |
2540 | char *t; | |
2541 | int i; | |
2542 | ||
2543 | switch (type) | |
2544 | { | |
2545 | case 'f': | |
2546 | case 'E': | |
2547 | type = 'f'; | |
2548 | prec = 2; | |
2549 | break; | |
2550 | ||
2551 | case 'd': | |
2552 | case 'D': | |
2553 | type = 'd'; | |
2554 | prec = 4; | |
2555 | break; | |
2556 | ||
2557 | default: | |
2558 | *sizep = 0; | |
2559 | return "bad call to md_atof"; | |
2560 | } | |
2561 | ||
2562 | /* 360/370/390 have two float formats: an old, funky 360 single-precision | |
92774660 | 2563 | * format, and the ieee format. Support only the ieee format. */ |
5b93d8bb AM |
2564 | t = atof_ieee (input_line_pointer, type, words); |
2565 | if (t) | |
2566 | input_line_pointer = t; | |
2567 | ||
2568 | *sizep = prec * 2; | |
2569 | ||
2570 | for (i = 0; i < prec; i++) | |
2571 | { | |
2572 | md_number_to_chars (litp, (valueT) words[i], 2); | |
2573 | litp += 2; | |
2574 | } | |
2575 | ||
2576 | return NULL; | |
2577 | } | |
2578 | ||
2579 | /* Write a value out to the object file, using the appropriate | |
2580 | endianness. */ | |
2581 | ||
2582 | void | |
2583 | md_number_to_chars (buf, val, n) | |
2584 | char *buf; | |
2585 | valueT val; | |
2586 | int n; | |
2587 | { | |
2588 | number_to_chars_bigendian (buf, val, n); | |
2589 | } | |
2590 | ||
2591 | /* Align a section (I don't know why this is machine dependent). */ | |
2592 | ||
2593 | valueT | |
2594 | md_section_align (seg, addr) | |
2595 | asection *seg; | |
2596 | valueT addr; | |
2597 | { | |
2598 | int align = bfd_get_section_alignment (stdoutput, seg); | |
2599 | ||
2600 | return (addr + (1 << align) - 1) & (-1 << align); | |
2601 | } | |
2602 | ||
2603 | /* We don't have any form of relaxing. */ | |
2604 | ||
2605 | int | |
2606 | md_estimate_size_before_relax (fragp, seg) | |
650f02e9 AM |
2607 | fragS *fragp ATTRIBUTE_UNUSED; |
2608 | asection *seg ATTRIBUTE_UNUSED; | |
5b93d8bb AM |
2609 | { |
2610 | abort (); | |
2611 | return 0; | |
2612 | } | |
2613 | ||
2614 | /* Convert a machine dependent frag. We never generate these. */ | |
2615 | ||
2616 | void | |
2617 | md_convert_frag (abfd, sec, fragp) | |
650f02e9 AM |
2618 | bfd *abfd ATTRIBUTE_UNUSED; |
2619 | asection *sec ATTRIBUTE_UNUSED; | |
2620 | fragS *fragp ATTRIBUTE_UNUSED; | |
5b93d8bb AM |
2621 | { |
2622 | abort (); | |
2623 | } | |
2624 | ||
2625 | /* We have no need to default values of symbols. */ | |
2626 | ||
5b93d8bb AM |
2627 | symbolS * |
2628 | md_undefined_symbol (name) | |
650f02e9 | 2629 | char *name ATTRIBUTE_UNUSED; |
5b93d8bb AM |
2630 | { |
2631 | return 0; | |
2632 | } | |
2633 | \f | |
2634 | /* Functions concerning relocs. */ | |
2635 | ||
2636 | /* The location from which a PC relative jump should be calculated, | |
2637 | given a PC relative reloc. */ | |
2638 | ||
2639 | long | |
2640 | md_pcrel_from_section (fixp, sec) | |
2641 | fixS *fixp; | |
650f02e9 | 2642 | segT sec ATTRIBUTE_UNUSED; |
5b93d8bb AM |
2643 | { |
2644 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
2645 | } | |
2646 | ||
5b93d8bb AM |
2647 | /* Apply a fixup to the object code. This is called for all the |
2648 | fixups we generated by the call to fix_new_exp, above. In the call | |
2649 | above we used a reloc code which was the largest legal reloc code | |
2650 | plus the operand index. Here we undo that to recover the operand | |
2651 | index. At this point all symbol values should be fully resolved, | |
2652 | and we attempt to completely resolve the reloc. If we can not do | |
2653 | that, we determine the correct reloc code and put it back in the | |
2654 | fixup. | |
2655 | ||
2656 | See gas/cgen.c for more sample code and explanations of what's | |
2657 | going on here ... | |
2658 | */ | |
2659 | ||
94f592af NC |
2660 | void |
2661 | md_apply_fix3 (fixP, valP, seg) | |
2662 | fixS *fixP; | |
2663 | valueT * valP; | |
5b93d8bb AM |
2664 | segT seg; |
2665 | { | |
94f592af | 2666 | valueT value = * valP; |
5b93d8bb | 2667 | |
94f592af | 2668 | if (fixP->fx_addsy != NULL) |
5b93d8bb | 2669 | { |
5b93d8bb AM |
2670 | #ifdef DEBUG |
2671 | printf ("\nmd_apply_fix3: symbol %s at 0x%x (%s:%d) val=0x%x addend=0x%x\n", | |
94f592af NC |
2672 | S_GET_NAME (fixP->fx_addsy), |
2673 | fixP->fx_frag->fr_address + fixP->fx_where, | |
2674 | fixP->fx_file, fixP->fx_line, | |
2675 | S_GET_VALUE (fixP->fx_addsy), value); | |
5b93d8bb AM |
2676 | #endif |
2677 | } | |
2678 | else | |
a161fe53 | 2679 | fixP->fx_done = 1; |
5b93d8bb AM |
2680 | |
2681 | /* Apply fixups to operands. Note that there should be no relocations | |
2682 | for any operands, since no instruction ever takes an operand | |
2683 | that requires reloc. */ | |
94f592af | 2684 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) |
5b93d8bb AM |
2685 | { |
2686 | int opindex; | |
2687 | const struct i370_operand *operand; | |
2688 | char *where; | |
2689 | i370_insn_t insn; | |
2690 | ||
94f592af | 2691 | opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; |
5b93d8bb AM |
2692 | |
2693 | operand = &i370_operands[opindex]; | |
2694 | ||
2695 | #ifdef DEBUG | |
2696 | printf ("\nmd_apply_fix3: fixup operand %s at 0x%x in %s:%d addend=0x%x\n", | |
2697 | operand->name, | |
94f592af NC |
2698 | fixP->fx_frag->fr_address + fixP->fx_where, |
2699 | fixP->fx_file, fixP->fx_line, | |
5b93d8bb AM |
2700 | value); |
2701 | #endif | |
2702 | /* Fetch the instruction, insert the fully resolved operand | |
2703 | value, and stuff the instruction back again. | |
92774660 | 2704 | fisxp->fx_size is the length of the instruction. */ |
94f592af | 2705 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
5b93d8bb | 2706 | insn.i[0] = bfd_getb32 ((unsigned char *) where); |
94f592af NC |
2707 | |
2708 | if (6 <= fixP->fx_size) | |
2709 | /* Deal with 48-bit insn's. */ | |
2710 | insn.i[1] = bfd_getb32 (((unsigned char *) where)+4); | |
2711 | ||
5b93d8bb AM |
2712 | insn = i370_insert_operand (insn, operand, (offsetT) value); |
2713 | bfd_putb32 ((bfd_vma) insn.i[0], (unsigned char *) where); | |
5b93d8bb | 2714 | |
94f592af NC |
2715 | if (6 <= fixP->fx_size) |
2716 | /* Deal with 48-bit insn's. */ | |
2717 | bfd_putb32 ((bfd_vma) insn.i[1], (((unsigned char *) where)+4)); | |
2718 | ||
2719 | /* We are done, right? right !! */ | |
2720 | fixP->fx_done = 1; | |
2721 | if (fixP->fx_done) | |
2722 | /* Nothing else to do here. */ | |
2723 | return; | |
5b93d8bb AM |
2724 | |
2725 | /* Determine a BFD reloc value based on the operand information. | |
2726 | We are only prepared to turn a few of the operands into | |
2727 | relocs. In fact, we support *zero* operand relocations ... | |
2728 | Why? Because we are not expecting the compiler to generate | |
2729 | any operands that need relocation. Due to the 12-bit naturew of | |
92774660 | 2730 | i370 addressing, this would be unusual. */ |
5b93d8bb AM |
2731 | { |
2732 | char *sfile; | |
2733 | unsigned int sline; | |
2734 | ||
2735 | /* Use expr_symbol_where to see if this is an expression | |
2736 | symbol. */ | |
94f592af NC |
2737 | if (expr_symbol_where (fixP->fx_addsy, &sfile, &sline)) |
2738 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5b93d8bb AM |
2739 | "unresolved expression that must be resolved"); |
2740 | else | |
94f592af | 2741 | as_bad_where (fixP->fx_file, fixP->fx_line, |
5b93d8bb | 2742 | "unsupported relocation type"); |
94f592af NC |
2743 | fixP->fx_done = 1; |
2744 | return; | |
5b93d8bb AM |
2745 | } |
2746 | } | |
2747 | else | |
2748 | { | |
2749 | /* We branch to here if the fixup is not to a symbol that | |
94f592af NC |
2750 | appears in an instruction operand, but is rather some |
2751 | declared storage. */ | |
5b93d8bb | 2752 | #ifdef OBJ_ELF |
94f592af | 2753 | i370_elf_validate_fix (fixP, seg); |
5b93d8bb AM |
2754 | #endif |
2755 | #ifdef DEBUG | |
2756 | printf ("md_apply_fix3: reloc case %d in segment %s %s:%d\n", | |
94f592af | 2757 | fixP->fx_r_type, segment_name (seg), fixP->fx_file, fixP->fx_line); |
5b93d8bb AM |
2758 | printf ("\tcurrent fixup value is 0x%x \n", value); |
2759 | #endif | |
94f592af | 2760 | switch (fixP->fx_r_type) |
5b93d8bb AM |
2761 | { |
2762 | case BFD_RELOC_32: | |
2763 | case BFD_RELOC_CTOR: | |
94f592af NC |
2764 | if (fixP->fx_pcrel) |
2765 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
2766 | /* Fall through. */ | |
5b93d8bb AM |
2767 | |
2768 | case BFD_RELOC_RVA: | |
2769 | case BFD_RELOC_32_PCREL: | |
2770 | case BFD_RELOC_32_BASEREL: | |
2771 | #ifdef DEBUG | |
2772 | printf ("\t32 bit relocation at 0x%x\n", | |
94f592af | 2773 | fixP->fx_frag->fr_address + fixP->fx_where); |
5b93d8bb | 2774 | #endif |
94f592af | 2775 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
5b93d8bb AM |
2776 | value, 4); |
2777 | break; | |
2778 | ||
2779 | case BFD_RELOC_LO16: | |
2780 | case BFD_RELOC_16: | |
94f592af NC |
2781 | if (fixP->fx_pcrel) |
2782 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5b93d8bb | 2783 | "cannot emit PC relative %s relocation%s%s", |
94f592af NC |
2784 | bfd_get_reloc_code_name (fixP->fx_r_type), |
2785 | fixP->fx_addsy != NULL ? " against " : "", | |
2786 | (fixP->fx_addsy != NULL | |
2787 | ? S_GET_NAME (fixP->fx_addsy) | |
5b93d8bb AM |
2788 | : "")); |
2789 | ||
94f592af | 2790 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
5b93d8bb AM |
2791 | value, 2); |
2792 | break; | |
2793 | ||
2794 | /* This case happens when you write, for example, | |
2795 | lis %r3,(L1-L2)@ha | |
2796 | where L1 and L2 are defined later. */ | |
2797 | case BFD_RELOC_HI16: | |
94f592af | 2798 | if (fixP->fx_pcrel) |
5b93d8bb | 2799 | abort (); |
94f592af | 2800 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
5b93d8bb AM |
2801 | value >> 16, 2); |
2802 | break; | |
2803 | case BFD_RELOC_HI16_S: | |
94f592af | 2804 | if (fixP->fx_pcrel) |
5b93d8bb | 2805 | abort (); |
94f592af | 2806 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
5b93d8bb AM |
2807 | (value + 0x8000) >> 16, 2); |
2808 | break; | |
2809 | ||
2810 | case BFD_RELOC_8: | |
94f592af | 2811 | if (fixP->fx_pcrel) |
5b93d8bb AM |
2812 | abort (); |
2813 | ||
94f592af | 2814 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
5b93d8bb AM |
2815 | value, 1); |
2816 | break; | |
2817 | ||
2818 | default: | |
bc805888 | 2819 | fprintf (stderr, |
94f592af | 2820 | "Gas failure, reloc value %d\n", fixP->fx_r_type); |
07726851 | 2821 | fflush (stderr); |
5b93d8bb AM |
2822 | abort (); |
2823 | } | |
2824 | } | |
2825 | ||
94f592af | 2826 | fixP->fx_addnumber = value; |
5b93d8bb AM |
2827 | } |
2828 | ||
2829 | /* Generate a reloc for a fixup. */ | |
2830 | ||
2831 | arelent * | |
2832 | tc_gen_reloc (seg, fixp) | |
650f02e9 | 2833 | asection *seg ATTRIBUTE_UNUSED; |
5b93d8bb AM |
2834 | fixS *fixp; |
2835 | { | |
2836 | arelent *reloc; | |
2837 | ||
2838 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
2839 | ||
2840 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
2841 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2842 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2843 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2844 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2845 | { | |
2846 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2847 | "reloc %d not supported by object file format", (int)fixp->fx_r_type); | |
2848 | return NULL; | |
2849 | } | |
2850 | reloc->addend = fixp->fx_addnumber; | |
2851 | ||
2852 | #ifdef DEBUG | |
2853 | printf ("\ngen_reloc(): sym %s (%s:%d) at addr 0x%x addend=0x%x\n", | |
2854 | fixp->fx_addsy->bsym->name, | |
2855 | fixp->fx_file, fixp->fx_line, | |
2856 | reloc->address, reloc->addend); | |
2857 | #endif | |
2858 | ||
2859 | return reloc; | |
2860 | } |